JP2001084487A - On-vehicle navigation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To operate a function, which displays an enlarged picture of an intersection under traffic control in the front of a user's vehicle and guides the user with voice and is conventionally operated only after user's destination setting and route search, without setting a destination. SOLUTION: This navigation system on the vehicle displays static traffic control data recorded in a map data base 3 and dynamic traffic control data which is received from FM multiple broadcasting and beacons and stored in an infrastructure data memory 9a, over the enlarged picture of the intersection in the going direction, which is displayed on a display device 7, as road sign marks or arrows or in distinction between impassable roads and other roads.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle navigation device which is mounted on a vehicle and displays a traveling route of the own vehicle together with a map on a display.

[0002]

2. Description of the Related Art A current position obtained by a vehicle position calculating device is displayed on an electronic map shown on a display device, or from a starting point or a current position input from an input device.
Similarly, a recommended route to a destination or an information point recorded on a recording medium input from the input device is calculated by the main controller using the Dijkstra method, the potential method, the A algorithm, or the like, and the guidance based on the recommended route is performed. Or, if the current position approaches the intersection on the recommended route while checking the guidance operation, a sound is output from the audio output device to notify that the intersection is approaching or the next turning direction, or the display device displays the intersection. An approach or a next turning direction is enlarged or displayed based on the shape of a road network recorded on a recording medium.

FIG. 7 is an example of a conventional intersection enlarged display screen, in which a map with a normal magnification is shown on the left half and a map with the intersection enlarged on the right half, respectively, and the current position of the own vehicle and the guidance route are displayed. Also, as a display of traffic regulation information, FIG.
As shown in (1), there is a method in which a mark indicating one-way traffic is displayed as an arrow on the displayed road.

[0004]

However, a driver of an automobile equipped with an on-vehicle navigation device does not always set a destination in advance and drive. On the other hand, route guidance is always performed in a state where a destination is set first and a recommended route resulting from route calculation based on the destination is held. That is, the conventional intersection guidance is for guiding in which direction the vehicle passes through the intersection during the guidance, and does not represent information such as intersection regulation. Therefore, in a state where the destination is not set, it is not possible to obtain detailed information of the intersection (in which direction can the vehicle bend?). In addition, the one-way display is displayed on all roads irrespective of the current road, and does not indicate the relationship with the current position of the vehicle.

The present invention solves the above-mentioned conventional problems. A vehicle-mounted navigation device capable of displaying traffic regulation information when approaching an intersection without setting a destination. Is provided.

[0006]

According to the present invention, there is provided an on-vehicle navigation device comprising: a recording medium reading means for reading map data from a recording medium; a vehicle position calculating means for calculating a current position of the vehicle; Display means for displaying map data read from the means and the current position output from the vehicle position calculating means, communication means for acquiring traffic control information from outside, and traffic control information for the traveling direction of the vehicle. And a display control means for displaying, on the display means, an enlarged view of the intersection with the traffic regulation information read from the recording medium reading means and the traffic regulation information obtained from the outside. With this configuration, even if an intersection is approaching, traffic control information can be acquired promptly without setting a destination, and driving with a margin can be performed.

[0007] Further, the on-vehicle navigation device according to the present invention is characterized in that the control means displays an impassable road in the traveling direction of the own vehicle so as to be distinguished from other roads. By displaying possible roads thinner than others, traffic information can be easily obtained.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, an on-vehicle navigation device according to the present embodiment includes a main controller 1 including a microcomputer, an own-vehicle position processing device 2 for calculating a current position of the own vehicle, and recording on a CD-ROM or the like. A storage medium reading device 4 for reading map data from a map database 3 composed of a medium, a main storage memory 5,
An input device 6, a video processing device 7, an audio output device 8,
An infrastructure data processing device 9 is provided.

The vehicle position processing device 2 includes an autonomous navigation sensor.
2a, a GP step S receiver 2b and a vehicle position calculating device 2c, the own vehicle related sensor information from the autonomous navigation sensor 2a and the current position information of the own vehicle by the GP step S receiver 2b receiving the GP step S satellite radio wave , The own vehicle position is calculated by the own vehicle position calculation device 2c.

The recording medium reading device 4 reads map data from the map database 3 and supplies the map data to the main controller 1. In addition to the road map data, the map database 3 stores an enlarged view of an intersection, character and symbol information, static road network data including intersection regulation information, and the like.

The video processing device 7 has a graphic controller 7a as a display control means for forming a display image based on the map data read from the map database 3 and the current position data output from the vehicle position processing device 2.
And a video RAM 7b for synthesizing and storing town names, road names, traffic regulation information, landmarks, intersection enlarged views, and the like,
Display device 7c composed of a liquid crystal display for displaying images
It has.

The infra-data processing device 9 uses an external VIC by a beacon receiver 9b and an FM multiplex receiver 9c.
Step S: Receives traffic regulation information from the information center and stores them in the infrastructure data memory 9a.

Next, the intersection enlarged display processing in the on-vehicle navigation device configured as described above will be described.
A description will be given based on the flowchart of FIG. First, in step S1, the vehicle speed is obtained from the own-vehicle position calculating device 2c, and if this is YES, that is, high speed (for example, 30 km / h or more), the process is terminated. If the answer to step S1 is NO, the process proceeds to step S2, where it is checked whether the in-vehicle navigation device is on the current position display screen. If NO, the process ends. If the answer to step S2 is yes, the process proceeds to step S3. If the destination exists in the vehicle-mounted navigation device and the route is being guided, the process proceeds to yes and the process ends. If the answer to step S3 is no, the process proceeds to step S4, where it is determined whether or not the intersection is near the front of the vehicle position. If no, the process ends. If the answer to step S4 is yes, the process proceeds to step S5, and it is determined whether there is a regulation in the exit direction of the intersection and whether the regulation is valid at the current time. Advance processing ends. If the answer to step S5 is yes, the process proceeds to step S6, where an enlarged view of the intersection is displayed. Subsequently, the process proceeds to step S7, where a regulation mark or the like as traffic regulation information is displayed. Subsequently, the process proceeds to step S8, where the current location at the intersection is displayed. Then, the process proceeds to step S9, where it is determined that the vehicle has passed through the intersection.
Proceed to 8. If the answer to step S9 is yes, the process proceeds to step S11, where the display of the enlarged view of the intersection is stopped, and the operation ends.

In the above embodiment, the traffic regulation information of the static road network is stored in the map database 3, but the traffic regulation information of the dynamic road network is
The data stored in the infrastructure data memory 9a is used. Specifically, a road sign mark such as entry prohibited and one-way traffic is stored in the main memory 5 in advance, and if there is a restriction on exit from the entry road (current location road) of the road network of the target intersection, The mark is displayed on the exit road displayed on the display device 7c. FIG. 3 shows an example in which the road sign mark 10 is added on the exit road that is enlarged and displayed in this way.

FIG. 4 shows an example of a case where a regulation is present on a road branching off from the current location road in the enlarged view, and this is displayed as a road sign mark 10 at an intersection. The road shape of the mark is calculated from the shape of the road network.

FIG. 5 shows an example of a case in which a restriction is present on a road branching off from the current location road in the enlarged view, and a direction in which traffic is allowed is displayed as an arrow 11 in response to the restriction. The direction of the arrow is calculated from the shape of the road network.

FIG. 6 shows a case where there is a restriction on a road branching off from the current location road in the enlarged view, whereas a road in an impassable direction is distinguished from other roads, for example, when the road is displayed thin. It is an example. In order to make the road lighter, there is a method of making the color of the road closer to the background color of the enlarged view.

In the above embodiment, the enlarged view of the intersection is not displayed except for the case where the cruising speed is high, the intersection where no traffic regulation information exists, and the display of the present location screen to prevent confusion of the driver. If there is a period (regulation time) in the traffic regulation, it is compared with the current year, month, day, and time information stored in the main controller. Do not display.

[0019]

As described above, according to the present invention, an enlarged view of an intersection is displayed during traveling regardless of whether or not a destination is set.
Also, since the intersection regulation information is displayed, the intersection information can be acquired earlier than the driver can visually recognize the road sign before entering the intersection. In addition, since traffic regulation information irrelevant to the current driving is not displayed, confusion of the driver can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an in-vehicle navigation device according to an embodiment of the present invention.

FIG. 2 is a flowchart showing an intersection enlarged display process according to the embodiment of the present invention;

FIG. 3 is a screen diagram showing an example in which a traffic regulation mark is displayed on an enlarged intersection display screen according to the embodiment of the present invention;

FIG. 4 is a screen diagram showing an example in which a traversable direction mark is displayed on an enlarged intersection display screen according to the embodiment of the present invention;

FIG. 5 is an exemplary screen view showing an example in which a traversable direction is indicated by an arrow on an enlarged intersection display screen according to the embodiment of the present invention;

FIG. 6 is a screen diagram showing an example in which an impassable road is distinguished from other roads and displayed on an enlarged intersection display screen according to the embodiment of the present invention;

FIG. 7 is a screen diagram showing an example of an enlarged intersection display screen in a conventional in-vehicle navigation device.

FIG. 8 is a screen diagram showing another example of an enlarged intersection display screen in a conventional in-vehicle navigation device.

[Explanation of symbols]

 Reference Signs List 1 main controller 2 own vehicle position processing device 3 map database 4 recording medium reading device 5 main storage memory 6 input device 7 video processing device 8 audio output device 9 infrastructure data processing device 2a autonomous navigation sensor 2b GPS receiver 2c own vehicle position calculation Device 7a Graphic controller 7b Video RAM 7c Display 9a Infrastructure data memory 9b Beacon receiver 9c FM multiplex receiver

Claims (2)

[Claims] 1. A recording medium reading means for reading map data from a recording medium, a vehicle position calculating means for calculating a current position of a vehicle, a map data read from the recording medium reading means and the vehicle position. Display means for displaying the current position output from the arithmetic means, communication means for acquiring traffic regulation information from the outside, and an enlarged view of an intersection where traffic regulation information in the traveling direction of the vehicle exists, from the recording medium reading means. A display control means for displaying the read traffic control information together with the read traffic control information and the externally obtained traffic control information on the display means. 2. The in-vehicle navigation device according to claim 1, wherein the control means displays a road that cannot be passed in the traveling direction of the own vehicle separately from other roads.