JP3039244B2 - Travel position display device - Google Patents

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 a current position of a car or the like on a display together with a map.

[0002]

2. Description of the Related Art FIG. 1 shows an outline of a vehicle-mounted traveling position display device. In FIG. 1, reference numeral 1 denotes a direction sensor,
The direction sensor 1 uses a geomagnetic sensor for detecting the absolute running direction of the vehicle and an optical gyro for detecting the relative running direction of the vehicle. Reference numeral 2 denotes a distance sensor that generates a pulse corresponding to the number of rotations of the wheels, and 3 denotes various sensor signals such as an ON / OFF signal of a brake switch, a parking switch, and the like, and a power supply voltage monitoring signal.

[0003] Reference numeral 4 denotes a sensor signal processing unit for processing sensor signals of the azimuth sensor 1 and the distance sensor 2 and the like.
robal Positioning System)
The GPS receiver 5 is a receiver that can obtain the position (latitude and longitude) of a receiving point by receiving and calculating radio waves transmitted from a plurality of satellites.

Reference numeral 6 denotes a CD-ROM drive.
The D-ROM drive 6 stores 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 vehicle interior. The display / operation unit 8 includes a liquid crystal display 8A that displays a map, a current traveling device, a direction, and the like of the automobile, and a liquid crystal display 8
A is provided with a touch panel 8B provided on the entire surface of A. A switch for instructing enlargement or reduction of a display map, a switch for instructing a route search, and a destination name selected from the place names displayed on the liquid crystal display 8A A switch for selecting a value is provided.

Reference numeral 9 denotes an apparatus main body installed in a trunk room or the like. The configuration of the apparatus main body 9 will be described.
10 is a CPU (Central Processing Unit) for performing various calculations, 11
Is a ROM (Read Only Memory) in which programs for various calculations performed by the CPU 10 are stored, and 12 is an azimuth sensor 1, a distance sensor 2, a GPS receiver 5, a CD-ROM.
A memory (D-RAM) 13 for storing data from the drive 6 and the results of calculations by the CPU 10, etc., is used as a backup for holding necessary data even when power supply to the apparatus main body 9 is stopped. A memory (S-RAM) 14 is an image processor for forming a display image based on patterns of characters and symbols displayed on the liquid crystal display 8A and current position data of the own vehicle, and 16 is a town name output from the CPU 10. A memory (V-RAM) for storing an image to be displayed on the liquid crystal display 8A by synthesizing Chinese characters and fonts such as road names, and 17 an RGB circuit for converting output data of the V-RAM 16 into color signals. The color signal is R
The data is output from the GB conversion circuit 17 to the liquid crystal display 8A. Reference numeral 18 denotes a communication interface. On the liquid crystal display 8A, as shown in FIG. 4, a surrounding map of a surrounding map of the current position of the own vehicle is displayed together with a town name and the like, and a own vehicle mark 19 for displaying the current position of the own vehicle is displayed in the display map. Things.

FIG. 8 shows a format of data stored in the CD-ROM 7, and reference numeral 20 denotes a disk label,
1 is a drawing parameter, 22 is figure management information, and 23 and 24
Is a figure leaf, which has background data, character data,
It stores road data and the like, and stores unit map data obtained by dividing a topographic map of the whole of Japan by latitude and longitude.

[0007] The map is set from a map (level 2) that roughly describes a wide area to a map (level 0) that describes a narrow area in detail. Each figure is composed of map display levels A, B and C describing the same area. The map display levels A, B, and C describe B in more detail than A and C in more detail than B.

Each of the map display levels A, B, and C is a description of a divided area obtained by dividing the area of each map display level into a plurality. Each unit is composed of a unit header, a character layer, a background layer, a road layer, It is composed of an option layer and the like. The text layer contains place names that appear on the map,
Road names, facility names, etc. are recorded, and roads,
Data for drawing a facility or the like (road type, intersection name, road name, place name, facility name, etc.) is recorded, and the road layer has coordinate points describing the road including the intersection as shown in FIG. Data relating to (nodes) and lines (links), for example, node numbers of nodes, latitude and longitude, link numbers of links, link distances, and the like are stored.

In FIG. 3, circles (○) indicate nodes, and lines between nodes indicate links. A black circle (●) of node number: 4 indicates an intersection node. The data recorded in the road layer is not directly involved in the map display, but is used as road network information for map matching. Reference numeral 25 denotes a deformed map shown in FIG. 8 (a map for displaying a specific expressway facility (interchange (IC), service area (SA), parking area (PA), etc.) on a highway) in a simplified graphic form. Map information and the like are recorded.

In FIG. 1, the output of the azimuth sensor 1 and sent to the CPU 10 via the distance sensor processing unit 4. CP
In U10, the current position of the vehicle is calculated, and the latitude and longitude of the current position are obtained. Further, the current position is corrected based on the data from the GPS receiver 5. The map data of the unit corresponding to the current position is read out from the CD-ROM 7 by the CD-ROM drive 6 based on the current position thus obtained, and the map data is stored in the memory (D-RAM) via the communication interface 18. )
12 is stored.

A portion of the map data stored in the D-RAM 12 is read by the CPU 10, converted into image data by the image processor 15, and written into the image memory 16. The image data stored in the image memory 16 is RGB
The liquid crystal display 8A is converted into color signals by the conversion circuit 17
And a map of a predetermined range centering on the current position is displayed. If the map data read from the DRAM 12 contains character codes and symbol codes, patterns corresponding to these character codes and symbol codes are read from the kanji / font ROM 14 and the liquid crystal display 8A
4, characters such as place names and symbols such as schools are displayed together with the map as shown in FIG. Further, the current position displayed on the liquid crystal display 8A is sequentially changed based on the traveling speed and traveling azimuth sequentially obtained as the vehicle travels.

FIG. 10 shows a display example of the liquid crystal display 8A. If the display of the deformed map is designated when displaying the map, the deformed map of the expressway is displayed. In FIG. 10, reference numeral 19 denotes a car mark of the car.
It shows the current position and the traveling direction of the vehicle obtained from the corresponding data of the map data and the deformation map data in the deformation information stored in the ROM 7.

Next, the map display operation of the conventional example will be described with reference to FIG. As shown in FIG. 9, in step S201, it is determined whether or not to display a deformed figure. If it is determined not to display the deformed map, the scale of the map to be displayed on the liquid crystal display 8A is selected in step S202. In step S203, the map display data of the selected scale is read out from the CD-ROM 7. C
In step S204, a map is drawn on the liquid crystal display 8A based on the data read by the D-ROM 7. Next, in step S205, the road network data recorded in the road layer is read from the CD-ROM 7, and the position and the direction of the own vehicle are determined from the road network data and the current position data calculated by the CPU 10 (step S205). In step S206, the own vehicle mark 19 is displayed on the map displayed on the liquid crystal display 8A in step S207.

If it is determined in step S201 that a deformed map is to be displayed, the flow advances to step S208 to read deformed map display data (25 in FIG. 8) from the CD-ROM 7. Next, the process proceeds to step S209 to display a deformed diagram. FIG. 10 shows a display example of a conventional highway deformed map on the liquid crystal display 8A, which indicates that the vehicle 19 is currently traveling on the road R.

[0015]

However, in the above conventional example, when a deformed map of an expressway is displayed, data for the deformed map is required as shown at 25 in FIG. Further, when displaying the position of the vehicle, the corresponding data between the position on the deformed map and the position on the map is required, and the amount of data stored in the CD-ROM 7 in FIG. 8 increases. there were.

An object of the present invention is to eliminate the above-mentioned conventional problems. A first object of the present invention is to display a deformed figure without specially providing data for the deformed figure, and to provide a data capacity. It is an object of the present invention to provide a travel position display device that can reduce the size of a vehicle.

Further, a second object of the present invention is as follows.
It is an object of the present invention to provide a travel position display device that can automatically see a wide-area deformed map in which the number of specific facilities for an expressway centered on a current position is displayed in a certain number or more.

The third object of the present invention is as follows.
It is an object of the present invention to provide a travel position display device that enables a driver to automatically view a deformed map without any operation when a vehicle moves on an expressway.

[0019]

According to a first aspect of the present invention, there is provided a vehicle position detecting means for detecting a vehicle position, and map data corresponding to the vehicle position detected by the vehicle position detecting means. And display means for displaying the map and the position of the own vehicle read from the storage means, and specific facility number determination means for determining the number of highway specific facilities in the map data read from the storage means. When the person manually displays the map of the expressway, when the number of specific facilities for the expressway is determined by the specific facility determination means to be equal to or less than a predetermined value,
It reads out the broader map data from the storage means and displaying on the display hand stage.

Further, the second invention is a vehicle for detecting a position of a vehicle.
Vehicle position detecting means and the vehicle position detecting means
The map data corresponding to the vehicle position is read from the storage means.
Display means for displaying the map and the position of the vehicle,
Road data in the map data read from the storage means.
Comprising a road type judging means for judging road type over data, the specific facility number determination means for determining a specific number of facilities for highway in the map data read from the Symbol <br/>憶means, the Self
The vehicle position detected by the vehicle position detecting means is the road type.
If it is determined that the vehicle is on the expressway by another determination means,
Displaying a map of the serial highway, sometimes the highway for a specific number of facilities by the specific facility determination unit in this case is less than or equal to a predetermined value, the more wide on the display means
A map is displayed.

[0021]

[0022]

[0023]

According to the present invention, the number of specific highway facilities is m on the highway displayed when the vehicle is on the highway.
When it is determined to be less than or equal to the number, the display scale is automatically changed,
It becomes possible to automatically view a wide-area deformed map.

According to the invention of the present application , by judging that the own vehicle has moved to the highway, the driver automatically converts the deformed view from the manual display to the normal display. This can save the labor of the people and improve the traffic safety.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
This will be described with reference to FIG. FIG. 1 is a block diagram of a travel position display device according to an embodiment of the present invention, FIG. 2 is a diagram showing a format of a CD-ROM of the travel position display device, and FIG. 3 is a CD-ROM of the travel position display device. FIG. 4 is a view showing recorded road data, FIG. 4 is a display map in the traveling position display device, FIG. 5 is a flowchart of display processing in the traveling position display device, and FIG. 6 is a display example on an expressway in the traveling position display device. FIG. 7 is a diagram showing a display example of a map on an expressway in the traveling position display device.

In FIG. 5, when the scale of the display map is selected in step S101, a map leaf and a map display level are selected in accordance with the selected scale, and a unit corresponding to the own vehicle position is selected. Data is CD-RO
It is read from M7 (step S102). In the next step S103, road network data recorded in the road layer of the CD-ROM 7 is read. In step S104, the own vehicle position, direction, and road type on the road network are determined based on the read road network data and the current position data of the own vehicle obtained by the CPU 10.

In the next step S105, it is determined whether or not this vehicle position is on a highway based on the road type obtained in step S104. If it is not on a highway, road data is drawn on the liquid crystal display 8A based on the map display data read in step S103 (step S112), and then a background is drawn (step S11).
3) The road network information obtained in step S104 and the own vehicle position and direction obtained by the CPU 10 are displayed as the own vehicle mark 19 on the display map (step S11).
4) The process ends (step S115).

When it is determined that the car is on the highway, the process proceeds from step S105 to step S106.
The number of specific facilities for expressways (specific facilities such as an interchange (IC), a parking area (PA), and a service area (SA)) in the background layer of the road network data obtained in step S104 is determined. If the number is m or more (m is a positive integer), the process proceeds to step S107, and the display width of the expressway is drawn by n (n is a positive integer) times using the road data in the background layer.

Next, roads other than expressways are drawn with a background color (step S108), and the flow advances to step S113. In step S106, the number of special facilities for expressways is m
If it is determined that the number is less than or equal to the number, the process proceeds to step S109, the display scale is changed, the map display data of the selected scale is read from the CD-ROM (step S110), and the CD-ROM
Read road network data from step S10
Proceed to 7.

FIG. 4 shows a map and a vehicle position mark 19 displayed on the liquid crystal display 8A based on the map data read from the CD-ROM 7. FIG. 6 shows C
An example is shown in which a deformed figure is displayed on the liquid crystal display 8A based on the figure data read from the D-ROM 7. The road type of the data read from the CD-ROM 7 is determined, the display width of the road determined to be an expressway is set to be a multiple of the display width of the expressway shown in FIG. By setting the display color of the road to be the same as the background color, the deformed map shown in FIG. 6 is displayed.

The map shown in FIG. 4 shows only three expressway specific facilities. On the other hand, in the deformed map display shown in FIG. 7, four specific highway facilities are displayed. In the above embodiment, n (for example, n =
4) When the above specific facilities are not displayed, it is determined in step S106 of FIG. 5 that the number of highway specific facilities is m or less, the display scale is changed in step S109, and further, steps S110, S111, and step S110 are performed. S10
7, Step S108, Step S113, Step S
By proceeding to 114, a deformed map in which four or more specific facilities are displayed as shown in FIG. 7 is displayed.

[0032]

As described above, according to the first aspect of the present invention, the deformed figure can be displayed without specially providing the data for the deformed figure, and the data capacity can be reduced. Having.

According to the second aspect of the present invention, it is possible to automatically view a wide-area deformed map in which the number of specified highway facilities centered on the current position is displayed in a certain number or more. Have.

Further, according to the invention of claim 3, there is an effect that when the vehicle moves on the highway, the driver can automatically see the deformed figure without any operation.

[Brief description of the drawings]

FIG. 1 is a glock diagram of a traveling position display device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a format of a CD-ROM of the traveling position display device.

FIG. 3 is a diagram showing road data recorded on a CD-ROM of the traveling position display device.

FIG. 4 is a display map on the traveling position display device.

FIG. 5 is a flowchart of a display process in the traveling position display device.

FIG. 6 is a diagram showing a display example on a highway in the traveling position display device.

FIG. 7 is a diagram showing a display example of a map on an expressway in the traveling position display device.

FIG. 8 is a diagram showing a format of a CD-ROM of a conventional traveling position display device.

FIG. 9 is a flowchart of display processing of a conventional traveling position display device.

FIG. 10 is a diagram showing an example of a display map (deformed diagram) in a conventional traveling position display device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Direction sensor 2 Distance sensor 5 GPS receiver 6 CD-ROM drive 7 CD-ROM 8 Display / operation unit 8A Liquid crystal display 8B Touch panel 9 Device body 10 CPU 15 Image processor

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-137100 (JP, A) JP-A-3-137678 (JP, A) JP-A-3-135719 (JP, A) JP-A-5-137 53498 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01C 21/00 G09B 29/00-29/10 G08G 1/0969

Claims (3)

(57) [Claims] 1. A vehicle position detecting means for detecting a vehicle position, and map data corresponding to the vehicle position detected by the vehicle position detecting means are read from a storage means to read a map and the vehicle position. And a specific facility number determining means for determining the number of highway specific facilities in the map data read from the storage means, wherein the driver manually displays a map of the highway. when, upon the highway for a specific number of facilities is less than or equal to a predetermined value by the specific facility determining means, displaying on the display hand stage reads the broader map data from the memory means A traveling position display device characterized by the following. 2. A vehicle position detecting means for detecting a vehicle position, and map data corresponding to the vehicle position detected by the vehicle position detecting means are read out from a storage means to read a map and the vehicle position. Display means for displaying a road type, road type determining means for determining the road type of the road data in the map data read from the storage means, and identification for expressway in the map data read from the storage means. A specific facility number judging means for judging the number of facilities, wherein when the own vehicle position detected by the own vehicle position detecting means is judged to be on an expressway by the road type judging means, the And displaying a map of a wider area on the display when the specific facility determining means determines that the number of the expressway specific facilities is equal to or less than a predetermined value. Position display device. 3. A vehicle position is detected, a map corresponding to the vehicle position and the vehicle position are displayed, and the road type of the road in the map and the number of expressway specific facilities in the map are determined. Then, when it is determined that the vehicle position is on the expressway, a map of the expressway is displayed. In this case, when the number of the expressway specific facilities is determined to be equal to or less than a predetermined value, the display is performed. A display method, further comprising displaying a wide-area map on the means.