JP2650526B2 - Drive guide device for vehicles - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drive guide device for a vehicle which provides a driver with a road map around the vehicle and various road traffic information.

[0002]

2. Description of the Related Art A current position of a vehicle is detected, road map data around the current position is read out from a road map data storage device and displayed, and road traffic information sent from a data service center is received and displayed on a display map. 2. Description of the Related Art A vehicular drive guide device that displays the information in association with each other is known (for example, see Japanese Patent Application Laid-Open No. 59-85599).

[0003]

However, in the conventional vehicle drive guide apparatus, all the traffic information such as traffic congestion, road construction, traffic regulation and the like sent from the data service center is transmitted to the occupant even if it is not always necessary. Since the information is superimposed and displayed on the display map, the amount of display information is increased, and the display screen is complicated and difficult to see.

It is an object of the present invention to provide a vehicle drive guide device for selecting and displaying road traffic information in an optimum range for an occupant according to the type of road on which the vehicle is traveling.

[0005]

The present invention will be described with reference to FIG. 1 which is a claim correspondence diagram. The present invention stores current position detecting means 100 for detecting the current position of a vehicle and road map data. Map storage means 101; road traffic information input means 102 for inputting road traffic information including at least information on traffic congestion, road work, and traffic regulation; current position of the vehicle detected by current position detection means 100; Road type determining means 103 for determining the type of road on which the vehicle is currently traveling based on the road map data stored in the means 101; and road traffic information input means based on the determination result of the road type determining means 103. A display range setting means 104 for setting a display range of the road traffic information input at 102; An information extracting unit 105 for extracting information of the set display range in the display range setting unit 104,
Display means 106 for reading road map data around the current position of the vehicle from the map storage means 101 and displaying the road map data in association with the road traffic information extracted by the information extracting means 105; Achieve the goal.

[0006]

The road type determining means 103 determines the type of the currently traveling road based on the current position of the vehicle and the road map data.
The display range of the road traffic information is set based on the determination result of step S03. Then, the information extracting means 105 extracts the information of the set display range from the road traffic information input by the road traffic information input means 102, and the display means 106 reads the current vehicle information read from the map storage means 101. The extracted road traffic information is displayed in association with the road map data around the position.

[0007]

2 and 3 are block diagrams showing the structure of a vehicle display device according to one embodiment. This device is composed of a microcomputer centered on a CPU 1 as shown in the figure. The CPU 1 exchanges data with various devices via the system bus 2 to perform various arithmetic processes. Reference numeral 3 denotes a direction sensor for detecting the traveling direction of the vehicle, which is connected to the system bus 2 via an amplifier 4, an A / D converter 5, and an I / O controller 6. Reference numeral 7 denotes a distance sensor that detects the traveling distance of the vehicle, and is connected to the system bus 2 via the I / O controller 6. 8 is
Keys for inputting various commands and data to the device.
It is connected to the system bus 2 via the O controller 9. Reference numeral 10 denotes an audio output speaker, which is connected to the system bus 2 via a sound generator 11 and an I / O controller 9. 12 is a position detection system using a satellite (Global Positioning).
System (hereinafter, referred to as GPS) receiver (hereinafter, referred to as GPS)
And is connected to the system bus 2 via the extended I / O controller 13. The current position of the vehicle is detected based on the current position information from the GPS receiver 12, the traveling direction information from the direction sensor 3, and the traveling distance information from the distance sensor 7. Further, reference numeral 14 denotes a receiver which receives, via an antenna 15, road traffic information such as traffic congestion, road construction, traffic regulation, and the like from beacons installed on roads and intersections.

In FIG. 3, reference numeral 16 denotes a CD-ROM storing road map data.
It is connected to the system bus 2 via the CSI controller 17. 18 is a VDT (Visual Display).
y CRT that functions as a terminal.
System bus 2 via graphic controller 19
And superimposes and displays on the road map around the current position of the vehicle the road traffic information in the optimum range for the occupant calculated in the procedure described later. Further, the system bus 2 has a CRT 18
V-RAM 20 for storing an image, ROM 21 for storing a control program described later, etc., and DR for temporarily storing data
AM22, Kanji ROM23, battery backup RAM that stores information such as the current position when the ignition is turned off
24, a vehicle speedometer 25 is connected.

FIG. 4 is a flowchart showing an example of a display control program stored in the ROM 21. The operation of the embodiment will be described with reference to this flowchart. Step S1
, The occupant operates the key 8 to input the set destination information and stores it in the D-RAM 22. Subsequent step S
In step 2, as described above, the current position of the vehicle is detected based on the current position information from the GPS receiver 12, the traveling direction information of the vehicle from the direction sensor 3, and the traveling distance information from the distance sensor 7. Next, in step S3, road map data around the current position of the vehicle and road maps of buildings and the like are input from the CD-ROM 16 and stored in the D-RAM 22. Further, in step S4, as described above, the receiver 14 receives road traffic information such as road congestion information, construction information, and regulation information from the road beacon, and
22.

In step S5, it is determined whether the road on which the vehicle is currently traveling is a general road or an expressway or a motorway. This determination is performed as follows.
The road map data stored in the CD-ROM 16 has position coordinates whose origin is a predetermined location. The road data having the same coordinates as the current position coordinates of the vehicle detected from the road map data is stored in the road map data. A search is performed, and the road type data included in the road data is read to determine whether the road is a general road, an expressway, or a motorway. Here, the reason for distinguishing between the general road and the expressway / motorway is to set the display range of the road traffic information according to these road types. In other words, when traveling on an expressway or a motorway, it is impossible to change course at a place other than the interchange, and at least until the next interchange where there is a possibility of changing the course, It is sufficient if only the road traffic information of the dedicated road is displayed, and the occupants do not need any other information. On the other hand, on general roads where the distance between intersections is short and the roads intersect in a complicated manner, road traffic information around the current position of the vehicle is always required. Therefore, in this embodiment, if the vehicle is currently traveling on an expressway or a motorway, only the road traffic information in the range from the next interchange to the destination is extracted from the received road traffic information and the road is extracted. On a map, on the other hand, when the vehicle is traveling on a general road, all road traffic information is displayed on the display map as in the past.

If it is determined in step S5 that the road on which the vehicle is currently running is an expressway or a motorway, in step S6 the next interchange viewed from the current position is displayed in the display range of the road traffic information. The starting point is set, and in the following step S7, the display range of the road traffic information is set based on the starting point and the destination. That is, as shown in FIG. 5, for example, a vertical line (indicated by a dashed line in the figure) passing through the interchange is drawn on a straight line (indicated by a broken line in the figure) connecting the interchange to the destination, and the vertical line is drawn. The area on the destination side is set as the display area of the road traffic information. In step S8, information on the set display range is extracted from the received road traffic information. That is, each piece of dynamic road information received from the road beacon has position coordinate information having a predetermined location as an origin, and the position coordinates are set to a predetermined location on a map displayed on the CRT 18 as an origin. After the conversion into the coordinates, it is determined whether or not the information is within the display range of the set road traffic information, and only the information within the display range is extracted.

In step S9, the road map data around the vehicle stored in the D-RAM 22 is displayed on the CRT 18, and on the road map, the road traffic information within the set display range extracted in the above step and the current vehicle information are displayed. A black point indicating the position and an arrow indicating the traveling direction of the vehicle are displayed in an overlapping manner. As a result, as shown in FIG. 5, road traffic information on the destination side from the next interchange is displayed on the road map around the vehicle. Thereafter, the process returns to step S2, and the above processing is repeated. On the other hand, if it is determined in step S5 that the road on which the vehicle is currently traveling is a general road, the process proceeds to step S10.
Then, all road traffic information within the display range of the CRT 18, a black point indicating the current position of the vehicle, and an arrow indicating the traveling direction of the vehicle are superimposed and displayed on the road map around the vehicle.

As described above, the type of the road on which the vehicle is currently traveling is determined, and if the vehicle is traveling on an expressway or a motorway, only road traffic information in the range of the destination is extracted from the next interchange. Since the information is displayed in association with the road map around the current location of the vehicle, only the road traffic information in a range that is really necessary for the occupant is displayed, and the display screen is easy to see.

In the above-described embodiment, the next interchange is set as the starting point of the display range of the road traffic information. However, based on the set destination information, the interchange that exits the currently running expressway or motorway is departed. May be detected, and the interchange may be set as the starting point of the display range. Then, the road traffic information in the range from the interchange exiting the expressway or the motorway to the destination is superimposed and displayed on the road map. At this time, an optimum route from the interchange exiting the expressway or the motorway to the destination is searched, and it is determined whether there is road traffic information on the route. That is, for example, if the road is impassable due to road construction, traffic regulation, or the like, another route is searched. If there is heavy traffic, another route is searched when the degree of congestion is more than a preset value. . If an optimal route is not found even after searching for the optimal route from the interchange to the destination, the display area of the road traffic information is displayed so that the user can exit the previous interchange and head toward the destination on a general road. Is switched to the previous interchange.

Further, the display range of the road traffic information when traveling on a general road may be circular or elliptical, and the display range may be set to include the destination side widely.

Further, when traveling on a major arterial road among ordinary roads, an intersection that changes the course from the traveling arterial road to an ordinary road is detected by searching for a route to the destination, and the intersection is identified as road traffic. The starting point of the information display range may be used to display the road traffic information in the range from the intersection to the destination side.

In the configuration of the above embodiment, the direction sensor 3, the distance sensor 7, and the GPS receiver 12 serve as current position detecting means, the CD-ROM 16 serves as a map storage means, and the receiver 14 and the antenna 15 serve as road traffic information input means. To
The CPU 1 constitutes a road type determining means, a display range setting means and an information extracting means, and the CRT 18 constitutes a display means.

[0018]

As described above, according to the present invention, the display range of the road traffic information is set based on the type of the road currently traveling, and the information of the display range set from the input road traffic information is set. Is extracted and displayed in association with a road map around the current position of the vehicle, so that only road traffic information in a range required by the occupant is displayed, and the map display screen is easy to see.

[Brief description of the drawings]

FIG. 1 is a diagram corresponding to claims.

FIG. 2 is a block diagram showing a configuration of one embodiment.

FIG. 3 is a block diagram showing a configuration of one embodiment.

FIG. 4 is a flowchart illustrating an example of a display control program.

FIG. 5 is a diagram showing a display example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 CPU 2 System bus 3 Direction sensor 4 Amplifier 5 A / D converter 6, 9 I / O controller 7 Distance sensor 8 Key 10 Speaker 11 Sound generator 12 GPS receiver 13 Extended I / O controller 14 Receiver 15 Antenna 16 CD- ROM 17 SCSI controller 18 CRT 19 Graphic controller 20 V-RAM 21 ROM 22 D-ROM 23 Kanji ROM 24 Backup ROM 25 Driving speedometer 100 Current position detection means 101 Map storage means 102 Road traffic information input means 103 Road type determination means 104 Display range setting means 105 information extraction means 106 display means

Claims (1)

(57) [Claims] 1. A current position detecting means for detecting a current position of a vehicle, a map storing means for storing road map data, and a road traffic information for inputting road traffic information including at least information on traffic congestion, road works and traffic regulations. Determining the type of road on which the vehicle is currently traveling based on information input means, a current position of the vehicle detected by the current position detection means, and the road map data stored in the map storage means Road type determining means to perform, display range setting means for setting a display range of the road traffic information input by the road traffic information input means based on the determination result of the road type determining means, and the road traffic information input means Information extraction means for extracting information on the display range set by the display range setting means from the road traffic information input in Reading road map data around the current position of the vehicle, the vehicle drive guide apparatus comprising: a display means for displaying in association with the road traffic information extracted in the road map data by the information extraction means.