JPH09126789A - Running position display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display gas station positions on a road map on a display screen only when a fuel residual quantity is lowered below a predetermined value at the time of running on a vehicle. SOLUTION: Fuel residual quantity data measured by means of a fuel residual quantity meter 21 of drivers own vehicle during running is taken into a CPU 10A. In the CPU 10A, it is determined whether a fuel residual quantity measured by means of the fuel residual quantity meter 21 is less than a predetermined value or nor, and if it is judged that the fuel residual quantity is less than the predetermined value, a gas station marks are displayed in the gas station positions on a road map displayed on a liquid crystal display 8A on the basis of a gas station position data recorded in a CD-ROM 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traveling position display device for displaying the current position of a vehicle such as an automobile on a display device together with a map.

[0002]

2. Description of the Related Art FIG. 6 is a functional block diagram showing a schematic configuration of a vehicle-mounted traveling position display device in a conventional example.

In FIG. 6, reference numeral 1 denotes an azimuth sensor, and the azimuth sensor 1 uses a geomagnetic sensor for detecting the absolute traveling azimuth of an automobile, an optical gyroscope for detecting the relative traveling azimuth of the automobile, or a vibration gyro. To be done. Reference numeral 2 is a distance sensor that generates a pulse according to the number of rotations of the wheel, and 3 is various sensor signals such as an ON / OFF signal of a brake switch and a parking switch and a power supply voltage monitoring signal.
Reference numeral 4 is a signal processing unit for processing sensor signals from the direction sensor 1, distance sensor 2 and the like, and 5 is a GSP (GlobalPosi).
This GPS receiver 5 is for obtaining the position (latitude, longitude) of the receiving point by receiving and calculating radio waves transmitted from a plurality of satellites.

Reference numeral 6 denotes a CD-ROM drive, which is C
The D-ROM drive 6 is a CD on which map data is recorded.
-To read map data from the ROM 7. Reference numeral 8 denotes a display / operation unit installed in the passenger compartment. The display / operation unit 8 is a liquid crystal display 8A for displaying a map and the current position, direction, etc. of the car, and a touch panel provided on the front surface of the liquid crystal display 8A. The touch panel 8B includes a switch for instructing enlargement and reduction of the displayed map, a switch for instructing route search, a switch for selecting a destination from the place names displayed on the liquid crystal display 8A, and a destination. It is equipped with a switch for entering the address. Reference numeral 9 denotes an apparatus main body, and the apparatus main body 9 is installed in a trunk room or the like.

Next, the structure of the apparatus body 9 will be described. The apparatus main body 9 includes a CPU (central processing unit) 10 that performs various calculations, a ROM 11 that stores programs for various calculations performed by the CPU 10, an orientation sensor 1, a distance sensor 2, and the like.
A memory (D which stores data from the GPS receiver 5, the CD-ROM drive 6 and the like, a calculation result in the CPU 10, etc.
RAM) 12, a backup memory (SRAM) 13 for holding necessary data even when the power supply to the apparatus body 9 is stopped, and a memory (patterns such as characters and symbols to be displayed on the liquid crystal display 8A are stored ( (Kanji / font ROM) 14, an image processor 15 for forming a display image based on map data, current position data of the vehicle, map data output from the image processor 15, current position data and Kanji / font ROM 14 A memory (VRAM) 16 for memorizing images to be displayed on the liquid crystal display 8A by synthesizing kanji / fonts such as output town names and road names, and an RGB conversion circuit 17 for converting output data of the VRAM 16 into color signals , RGB
The color signals converted by the conversion circuit 17 are displayed on the liquid crystal display 8
It is output to A. Reference numeral 18 is a communication interface for transmitting and receiving data between the CPU 10, the GPS receiver 5, the DC-ROM drive 6 and the display 8, and 19 is the CPU 1
The voice processor 19 is connected to 0, and the voice processor 19 creates a predetermined voice message based on a command from the CPU 10, and the voice message is output from the speaker 20.

[0006]

In the conventional traveling position display device as described above, where is the gas station on the map even when the remaining fuel amount becomes less than a predetermined amount while the vehicle is traveling. There is a problem that I do not understand.

Further, it is possible to display the position of the gas station on the road map displayed on the display means, but with this, the position of the gas station is always displayed even when it is not necessary, and the display screen is displayed. There was a problem that it became complicated and it was difficult to recognize the necessary display contents.

The present invention solves the above-mentioned conventional problems, and only when the remaining fuel amount becomes less than a predetermined value while the vehicle is traveling, a road map on the display screen or a search is performed. An object of the present invention is to provide a traveling position display device capable of displaying a gas station position on a route.

[0009]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention relates to a running position display device for displaying the present position of a vehicle together with a map on a display device, and a fuel remaining amount for detecting the remaining fuel amount of the vehicle. An amount detecting means is provided, and when it is determined that the remaining fuel amount detected by the remaining fuel amount detecting means is less than a predetermined value, the gas station position is displayed or displayed on the road map displayed on the display means. It is configured to display only the positions of gas stations existing along the searched route of the vehicle displayed on the means.

As a result, only when refueling is necessary,
You can automatically display the gas station position on the road map of the display screen where your vehicle is located, or you can automatically display only the gas station positions that exist along the search route. The problem of hindering the visibility of the road map information due to the display can be solved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention of claim 1 of the present invention is a storage means for storing road data and position data of a gas station, and a present position of the own vehicle based on a running speed and a running direction of the own vehicle. A current position calculating means to be obtained, a display means for displaying the road map read from the storage means and the current position obtained by the current position calculating means, and a fuel remaining amount for detecting the fuel remaining amount of the own vehicle. The detection means and the remaining fuel amount detected by the remaining fuel amount detection means determine whether the remaining fuel amount is less than a predetermined value, and when it is determined that the remaining fuel amount is less than the predetermined value, the position of the gas station on the road map displayed on the display means. And processing means for displaying the position of the gas station based on the data, and processing that the remaining fuel amount detected by the remaining fuel amount detecting means is less than a predetermined value during the traveling process of the vehicle. Displayed when judged by means Gas stations located on the road map that is displayed on the stage is automatically displayed.

[0012] According to a second aspect of the present invention, a storage means for storing road data and position data of a gas station, and a current position calculation means for obtaining the current position of the vehicle based on the traveling speed and traveling direction of the vehicle. A display means for displaying the road map read from the storage means and the current position obtained by the current position calculation means, and a route to the input destination is searched based on the road data, The route searching means for displaying the searched route on the display means, the fuel remaining amount detecting means for detecting the fuel remaining amount of the own vehicle, and the fuel remaining amount detected by the fuel remaining amount detecting means are less than a predetermined value. Is judged,
When the vehicle is judged to be less than a predetermined value, it is provided with processing means for displaying the position of the gas station existing along the searched route displayed on the display means based on the position data of the gas station, When the processing means determines that the fuel remaining amount detected by the fuel remaining amount detecting means becomes less than the predetermined value in the traveling process of, the gas station position existing along the searched route displayed on the display means is displayed. Only displayed automatically.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIGS. FIG. 1 is a functional block diagram showing a schematic configuration of a traveling position display device according to the present invention.

In FIG. 1, the same components as those in FIG. 6 are designated by the same reference numerals, and the description of the components will be omitted. Focusing on the parts different from those in FIG. 6, the remaining fuel amount of the vehicle is measured. A fuel level meter 21 is provided, and the fuel level data measured by the fuel level meter 21 is sent to the CPU 1 via the sensor signal processing unit 4.
CPU configured to be taken into 0A, CPU
10A has various processing functions described with reference to FIG.
The route to the input destination is searched based on the road data, the route search function for displaying the searched route on the liquid crystal display 8A, and whether the remaining fuel amount is less than a predetermined value is determined. The processing function of displaying the gas station position on the road map displayed on the display 8A, or the processing function of displaying only the gas station position existing along the route search displayed on the liquid crystal display 8A on the liquid crystal display 8A, Further, a processing program for realizing these functions is stored in the program ROM 11, D
The C-ROM 7 has a structural feature in that, in addition to the map data, the data for the location of the gas station, the toilet, and the data for displaying the gas station mark (GS) and the toilet mark (T) are recorded.

Next, the operation of the present embodiment configured as described above will be described with reference to FIGS.

FIG. 2 is a flow chart showing the procedure of the filling station position display processing in the present embodiment. First, step S
At 1, it is determined whether or not the display of the gas station that has been initialized in advance is possible. Here, when the gas station is not displayed, the process proceeds to normal navigation processing, and when the gas station is displayed, the process proceeds to step S2, and the fuel level meter 2 of the own vehicle in the traveling process is set.
The remaining fuel amount data measured in 1 is taken into the CPU 10A through the sensor signal processing unit 4. The CPU 10A determines whether or not the fuel remaining amount measured by the fuel remaining amount meter 21 is less than a preset predetermined value (step S3).

If it is determined that the value is less than the predetermined value, the process proceeds to step S4, and the gas station position data recorded on the CD-ROM 7 is used as the gas station position on the road map displayed on the liquid crystal display 8A. Gas station mark (G
S) is displayed as shown in FIG. 3, and voice message data is sent from the voice processor 19 to the speaker 20 in response to the display.
To inform the driver that the remaining fuel amount is less than the predetermined value. Further, when it is determined in step S3 that the remaining fuel amount is not less than the predetermined value, the process proceeds to step S5, and it is determined whether the fueling station position display has already been performed. Here, if an affirmative determination is made, the process proceeds to step S6, the gas station position display displayed on the liquid crystal display 8A is erased, and the process proceeds to normal navigation. Also, when a negative determination is made, the process proceeds to normal navigation processing.

FIG. 4 shows an example in which a road map in a normal navigation process is displayed on the liquid crystal display 8A.

As described above, according to the present embodiment, when the fuel remaining amount becomes less than the predetermined value, the liquid crystal display 8
The gas station mark (GS) is displayed on the road map displayed in A, and the gas station mark is not displayed when the remaining fuel amount is equal to or greater than a predetermined value, so the visibility of road map information is obstructed by the gas station mark. Therefore, it is possible to accurately recognize the road information content displayed on the liquid crystal display 8A.

Next, a case will be described in which the position of the gas station existing on the searched route to the destination is displayed.

In this case, after operating the route search switch on the touch panel 8B, the destination point on the map displayed on the liquid crystal display 8A is designated. Along with this, C
The PU 10A adds the link costs of all the routes from the starting point to the destination, selects the route with the lowest link cost, and displays this route, for example, in red on the display map of the liquid crystal display 8A. FIG. 5 shows an example of the display, and a bold line indicates the selected search route.

When it is detected that the remaining fuel amount of the vehicle is less than the predetermined value in the display state of the searched route,
Based on the gas station position data recorded in the CD-ROM 7, the CPU 10A sets a gas station mark (GS) at the position of the gas station existing along the search route from the current position of the vehicle to the destination in FIG. Display as shown.

In the present embodiment as described above, only the positions of the gas stations existing along the searched route can be displayed on the map displayed on the liquid crystal display 8A.

[0024]

As is clear from the above description, according to the traveling position display device of the present invention, even if the map data is not updated each time a new road is constructed, roads that are not on the map data can be displayed once. There is an effect that a new road can be displayed by the road shape storage means only by performing a motion.

[Brief description of the drawings]

FIG. 1 is a functional block diagram showing a configuration of an embodiment of a traveling position display device according to the present invention.

FIG. 2 is a flowchart showing a procedure of a gas station position display process according to the present embodiment.

FIG. 3 is a display diagram showing a display example of a gas station position in the present embodiment.

FIG. 4 is a display diagram showing a normal display example according to the present embodiment.

FIG. 5 is a display diagram showing a display example of gas station positions existing on a searched route in the present embodiment.

FIG. 6 is a functional block diagram showing a configuration of a conventional traveling position display device.

[Explanation of symbols]

 1 Direction Sensor 2 Distance Sensor 4 Sensor Signal Processing Unit 5 GPS Receiver 6 CD-ROM Drive 7 CD-ROM 8 Display / Operation Unit 8A Liquid Crystal Display 8B Touch Panel 9 Device Main Body 10A CPU 11 Program ROM 12 SRAM 13 DRAM 14 Kanji / Font ROM 15 Image Processor 16 VRAM 17 RGB Conversion Circuit 18 Communication Interface 19 Voice Processor 20 Speaker 21 Fuel Fuel Gauge

Claims (2)

[Claims] 1. A storage means for storing road data and position data of a gas station, a current position calculation means for obtaining a current position of the vehicle based on a traveling speed and a traveling direction of the vehicle, and reading from the storage means. Display means for displaying the issued road map and the current position obtained by the current position calculating means, fuel remaining amount detecting means for detecting the fuel remaining amount of the own vehicle, and fuel remaining amount detecting means for detecting Processing means for determining whether the remaining fuel amount is less than a predetermined value and displaying the gas station position based on the position data of the gas station on the road map displayed on the display means when it is determined to be less than the predetermined value. And a traveling position display device. 2. A storage means in which road data and position data of a gas station are stored, a current position calculation means for obtaining a current position of the vehicle based on a traveling speed and a traveling direction of the vehicle, and reading from the storage means. Display means for displaying the issued road map and the present position obtained by the present position calculating means, and a route to the inputted destination is searched based on the road data, and the searched route is displayed by the displaying means. Displayed on the route search means, the fuel remaining amount detecting means for detecting the fuel remaining amount of the own vehicle, and the fuel remaining amount detected by the fuel remaining amount detecting means is determined to be less than a predetermined value, and less than the predetermined value. And a processing unit for displaying the position of a gas station existing along the searched route displayed on the display unit when it is determined that the traveling position is displayed based on position data of the gas station.