JPH06195594A - Gasoline station display device - Google Patents

Abstract

PURPOSE:To display gasoline stations on a map in a car navigation device so as to prevent gasoline in a gasoline tank of a vehicle from being exhausted. CONSTITUTION:The navigation device storing the road map data, locating the vehicle, displaying the location of the vehicle on the road map, and guiding the route of the vehicle is provided with a search starting search of gasoline stations to supply gasoline by judging whether or not the remaining gasoline quantity in the gasoline tank of the vehicle is under the prescribed value, travelling distance calculation section 72 calculating the travelling distance based on the remaining gasoline quantity by starting search of the service stations, and gasoline station display control section 73 searching gasoline stations within the range supplying the gasoline based on the position of the vehicle and the travelling distance from the road map data and displaying them on the road map.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a car navigation system, and more particularly to a system for displaying a gas station for preventing a so-called gas shortage, in which a gasoline tank of a vehicle runs out of gasoline.

[0002]

2. Description of the Related Art Conventionally, there is a car navigation device as a technique in such a field that displays the position of the vehicle on a map and guides a route to a target if necessary. On the other hand, the remaining amount of gasoline in the vehicle's gasoline tank is displayed, and the driver is looking for a gas station on the road on which the vehicle is traveling in order to replenish the gasoline while observing the remaining amount of gasoline. In this way, the road display and the display of the remaining amount of gasoline by the car navigation device exist independently of each other, and the mutual relationships are not necessarily close.

[0003]

In the conventional gasoline level display, in order to prevent the driver from overlooking the gas station in the case of a driver who is unfamiliar with the land, he or she uses nerves to cause stress, especially in traffic congestion. There was a problem of letting it. In such a case, it would be convenient if there is information from the remaining gasoline level at which gas station should be replenished with gasoline.

Therefore, in view of the above problems, it is an object of the present invention to provide a gas station display device capable of giving a driver information about a gas station in conjunction with a car navigation system.

[0005]

In order to solve the above problems, the present invention provides a storage medium for storing road map data,
A gas station display control unit is provided in a navigation device having a location device for obtaining a vehicle position and a display device for displaying the vehicle position on a road map. The gas station display control unit searches the road map data of the storage medium for a gas station in a range where gasoline can be replenished based on the vehicle position obtained from the location device and the traveling distance obtained from the traveling distance calculation unit, The display is displayed on the road map.

The gas station display control unit may input date, day of the week, and time data and exclude gas stations that are closed or closed from the display. Further, the navigation device is provided with a route guidance device for guiding the route of the vehicle and a traveling distance calculation unit. The mileage calculation unit is configured to calculate a mileage that can be traveled based on the remaining amount of gasoline by starting a search for a gas station.

The route guidance device calculates a vehicle position obtained from the location device and a route to a gas station to be replenished with gasoline, displays the calculated route on the display device, and guides the route. Good.

[0008]

According to the gas station display device of the present invention,
It is determined whether the remaining amount of gasoline provided in the vehicle's gasoline tank is below a predetermined value, and a gas station for replenishing gasoline is searched from the road map data of the storage medium and displayed on the road map of the display device. . In this way, an appropriate gas station can be displayed in order to prevent the vehicle from running out of gas, and it is not necessary to search for a gas station as in the conventional case, and the gasoline can be replenished smoothly. Further, the signal of the gasoline remaining amount can be used more effectively than before, and a new function can be added as a navigation device, and the effect as navigation can be further enhanced. Further, by inputting date, day of the week, and time data and excluding gas stations that are closed and closed on holidays, it is possible to display gas stations that can refuel more reliably.

When the search for the gas station is started, the distance that can be traveled is calculated based on the remaining amount of gasoline. Gas stations within a range where gasoline can be replenished are searched from the road map data every moment based on the vehicle position and the traveled distance and are displayed on the road map. By calculating the vehicle position and the route to the gas station where the gas should be replenished, and displaying and guiding the calculated route, it is possible to reliably guide the vehicle to the gas station.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a gas station display device according to an embodiment of the present invention. The gas station display device shown in the figure uses a car navigation device as its configuration. First, this car navigation device will be described. The car navigation device stores a database DB regarding maps and roads, such as a CD (Compact Displacement).
c), storage medium 1 such as IC (Integrated Circuit) card
And a location device 2 for inputting signals from a direction sensor, a vehicle speed sensor and the like to obtain a vehicle position, and further inputting traffic information from a beacon for performing road-vehicle communication, and a CRT.
(Cathode Ray Tube), LCD (Liquid Crystal Display)
The map data from the storage medium 1 is displayed, the current position of the vehicle obtained by the location device is displayed by a vehicle marker, the target position is further displayed, and a route from the vehicle position to the target position is displayed, for example. , A display device 3 that is overlaid with a bold line, and a route search device that inputs a target position from the outside, inputs the current position of the vehicle from the location device 2, and searches for a route from the departure position to the target position by the Dijkstra method or the like. 4 is provided.

FIG. 2 is a diagram showing road data stored in the storage medium 1 of FIG. As shown in this figure (a), the road data is composed of link data regarding a plurality of links obtained by subdividing the road. Each link data is the start point node N
o. , End node No. , Link orientation, actual link length, and attributes. This attribute is, for example, one-way road, road type (national road, highway, main local road, etc.), width, number of lanes, speed regulation, and information about manufacturers such as gas stations, holidays, opening hours, gasoline, light oil, etc. And so on.

Further, as shown in FIG. 3B, the road data is composed of a plurality of node data regarding nodes at both ends of the subdivided link. Each node data includes a plurality of link No.s connected to each node. Consists of. Returning to FIG. 1, the gas station display device is provided with gas station information from the storage medium 1, information of the current position of the vehicle from the location device 2, and a gasoline remaining amount which is provided in the gasoline tank of the vehicle and detects the remaining amount of gasoline. A gas station display control device 7 for inputting a gasoline remaining amount signal from the sensor 5, date, day of the week, date, day of the week, time information and the like from the time generation device 6 and displaying the gas station on the display control device 3 is provided.

In FIG. 3, the gas station display control device 7 of FIG. 1 is provided with a search start judging section 71 for inputting a gasoline remaining amount signal from the gasoline remaining amount sensor 5. The search start determination unit 71 uses a gas station display control 73 described below.
However, it is determined whether the remaining amount of gasoline has become a predetermined value or less, for example, 5 liters or less. This predetermined value is determined in consideration of the fuel consumption of the vehicle, the current position of the vehicle and the number of gas stations in the vicinity. Since the predetermined value is affected by the surroundings in this way, it may be possible to change it from the outside.

In the above structure, the route search device 4, the gas station display control device 7, etc. are formed by a microcomputer. Next, the gas station display control device 7 causes the travel distance calculation unit 72 to calculate the travel distance based on the remaining amount of gasoline and the fuel consumption of the vehicle based on the determination that the search start determination unit 71 has started the search. To have. The traveling distance calculation unit 72 calculates this traveling distance moment by moment.

Further, a gas station display control device 7
Includes a gas station display control unit 73. In the gas station display control unit 73, the road map data from the storage medium 1 is set to a gas station located within a range centered on the current position of the vehicle from the location device and having the travel distance from the travel distance calculation unit 72 as a radius. Read from.
The read gas station is displayed on the storage device 3.

FIG. 4 is a diagram showing a gas station displayed in the road data displayed on the display device 3. As shown in the figure, if it is known that there is a gas station in the traveling direction, it becomes easy to determine at which gas station the gasoline should be supplied. In this way, a large number of gas stations are displayed at first, but as the amount of remaining gasoline decreases, the traveling range becomes narrower, so the number of displays also decreases. In this way, the gas stations are squeezed,
Even if you overlook a little, it will always be easy to determine the best gas station.

The gas station display control unit 73 may display the date, day of the week, time generator 6 excluding those on holidays and closed stores based on the date, day of the week, and time information. This ensures a reliable supply of gasoline. Further, the manufacturer of the gasoline to be supplied may be displayed. This is to facilitate the supply of the desired gasoline.

Further, when the gas station display control unit 73 determines the gas station to be replenished, if the determined gas station is designated as a target value in the route searching device 4, the route to the determined gas station is determined. Explore. Therefore, it is possible to reliably reach the gas station. The route search device 4 uses the Dijkstra method. In the Dijkstra method, etc., based on the link data relating to the information of the link obtained by subdividing the road and the node data relating to the information of the connection relation of the nodes at the both ends of the road, the starting position and the target position as the search starting point Node data → link data → node data → link data ...,
In this order, the route with the shortest route length is calculated.
This shortest route is obtained as the shortest distance among the plurality of routes from the starting position to the target position by connecting the links with the node data and accumulating the link length in the link data.

[0019]

As described above, according to the present invention, it is judged whether the remaining amount of gasoline provided in the gasoline tank of the vehicle is equal to or less than a predetermined value, and the search for a gas station for replenishing gasoline is started, When the search for a gas station is started, the distance that can be traveled is calculated based on the remaining amount of gasoline, and the gas stations within the range where gasoline can be supplied based on the vehicle position and the traveled distance are searched from the road map data and displayed on the road map. , It is possible to display an appropriate gas station, and there is no need to search for a gas station as in the past, and it is possible to refuel smoothly. In addition, it will be possible to guide passengers to a gas station on holidays and excluding closures.

[Brief description of drawings]

FIG. 1 is a diagram showing a gas station display device according to an embodiment of the present invention.

2 is a diagram showing road data stored in a storage medium 1 of FIG. 1. FIG.

FIG. 3 is a diagram showing a gas station display control device 7 of FIG. 1.

4 is a diagram showing a gas station displayed in the road data displayed on the display device 3. FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Storage medium 2 ... Location device 3 ... Display device 4 ... Path device 5 ... Gasoline remaining amount sensor 6 ... Date and time device 7 ... Gas station display control device 71 ... Search start determination unit 72 ... Mileage calculation unit 73 ... Gasoline Stand display controller

Claims (4)

[Claims] 1. A storage medium (1) for storing road map data and a location device (2) for determining a vehicle position.
And a navigation device having a display device (3) for displaying the vehicle position on a road map, the gas station is displayed by judging whether the remaining amount of gasoline provided in the vehicle's gasoline tank is below a predetermined value. A gas station display device comprising a gas station display device control unit (73) for displaying on a road map of the device (3). 2. A storage medium (1) for storing road map data and a location device (2) for determining a vehicle position.
And a display device for displaying the vehicle position on a road map (3)
And a navigation device having a route guidance device (4) for guiding the route of the vehicle, a travel distance calculation unit (7) for calculating a travelable distance based on the remaining amount of gasoline by starting a search for a gas station.
2), and a gas station located within a range where gasoline can be replenished based on the vehicle position obtained from the location device (2) and the traveling distance obtained from the traveling distance calculation unit (72), of the storage medium (1). A gas station display device, comprising a gas station display control unit (73) which is searched from road map data and is displayed on the road map of the display device (3). 3. The gas station display control unit (7)
3. In 3), the date, the day of the week, and the time data are input, and the gas stations that are closed or closed are excluded from the display.
The described gas station display device. 4. The route guidance device (4) calculates a vehicle position obtained from the location device (2) and a route to a gas station to which gasoline is to be replenished, and the calculated route is displayed on the display device (3). The gas station display device according to claim 2, wherein the gas station display device guides the gas station.