JP2809042B2 - 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 travel position display device for displaying the current position of a car or the like on a display device 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. Reference numeral 4 denotes a sensor signal processing unit for processing sensor signals such as a direction sensor 1 and a distance sensor 2. Reference numeral 5 denotes a GPS (Global Positioning System) receiver. The GPS receiver 5 receives radio waves transmitted from a plurality of satellites and performs calculations. By doing so, the position (latitude, longitude) of the receiving point can be obtained. Reference numeral 6 denotes a CD-ROM drive. The CD-ROM drive 6 reads map data from a CD-ROM 7 on which map data is recorded. Reference numeral 8 denotes a display / operation unit provided in the vehicle interior. The display / operation unit 8 is provided on a liquid crystal display 8A for displaying a map, a current traveling position, a direction, and the like of the automobile, and is provided on a front surface of the liquid crystal display 8A. The touch panel 8B includes switches for instructing enlargement and reduction of a display map,
A switch for instructing a route search, a switch for selecting a destination from the place names displayed on the liquid crystal display 8A, and the like are provided. Reference numeral 9 denotes an apparatus main body, which is installed in a trunk room or the like.

Next, 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 operations performed by the CPU 9 are stored, 12 is data from the azimuth sensor 1, the distance sensor 2, the GPS receiver 5, the CD-ROM drive 6, etc., and the operation results of the CPU 10, etc. (DRAM), 13 is a backup memory (SRAM) for holding necessary data even when power supply to the apparatus main body 9 is stopped, 14 is characters displayed on the liquid crystal display 8A, A memory (kanji, font ROM) in which patterns such as symbols are stored; 15 an image processor for forming a display image based on map data, current position data of the vehicle, etc .;
Map data, current location data and kanji output from
A memory (VRAM) for storing images to be displayed on the liquid crystal display 8A by synthesizing kanji and fonts such as street names and road names output from the font ROM 14;
This is an RGB conversion circuit for converting the output data of M16 into a color signal, and the color signal is output from the RGB 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. 2, a map around the current position of the vehicle is displayed together with the name of the town, and a vehicle mark 19 indicating the current position of the vehicle is displayed in the display map. is there.

FIG. 3 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 data for each unit map obtained by dividing a topographic map of the whole of Japan by latitude and longitude. In the figure, a figure (level 0) that roughly describes a wide area and a figure (level 0) that describes a narrow area in detail are set. Each leaf is composed of view sets A, B and C describing the same area. View sets A, B, and C describe B in more detail than A and C in more detail than B. Each of the view sets A, B, and C includes view set management information and a plurality of units. Each unit describes a divided area obtained by dividing the area of each view set into a plurality. Each unit includes a unit header, a character layer, a background layer, a road layer, an option layer, and the like. The character layer records place names, road names, facility names, and the like displayed on the map, the background layer records data for drawing roads, facilities, and the like, and the road layer records, as shown in FIG. Stores data on coordinate points (nodes) and lines (links) describing roads including intersections, for example, node numbers of nodes, latitude and longitude, link numbers of links, link distances, and the like. In FIG. 4, circles (○) indicate nodes, and lines between the nodes indicate links. A black circle (丸) of the 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.

[0005] In FIG. 1, the output of the azimuth sensor 1 and the output of the distance sensor 2 are transmitted to the CPU 10 via the sensor processing unit 4.
Sent to The CPU 10 calculates the current position of the vehicle, and obtains the latitude and longitude of the current position. Also GPS
The current position is corrected based on the data from the receiver 5. The map data of the unit corresponding to the current position is read from the CD-ROM 7 by the CD-ROM drive 6 based on the current position obtained in this manner, and the map data is stored in the memory (DRAM) 12 via the communication interface 18. Is stored. A part of the map data stored in the DRAM 12 is read by the CPU 10,
The image data is 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 converted into color signals by the RGB conversion circuit 17 and sent to the liquid crystal display 8A, where 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 and the font ROM 14, and characters such as place names are displayed on the liquid crystal display 8A together with the map. , School, etc. are displayed. 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. 2 shows a display example of the liquid crystal display 8A. A road map is displayed, along with place names, intersection names, road names, and the like. In FIG. 2, reference numeral 19 denotes a vehicle mark of the vehicle, and the vehicle mark 19 indicates a current position and a traveling direction of the vehicle.

Next, the map display operation of the conventional example will be described with reference to FIG. As shown in FIG.
To select the scale of the map to be displayed on the liquid crystal display 8A. In step B, the map display data of the selected scale is read out from the CD-ROM 7. In step C, a map is drawn on the liquid crystal display 8A based on the data read from the CD-ROM 7. Next, in Step D, the CD-ROM
7, the road network data recorded in the road layer is read, and the road network data and the CPU
The position and orientation of the own vehicle are determined from the current position data obtained by calculation in step 10 (step E), and the own vehicle mark 19 is displayed on the map displayed on the liquid crystal display 8A in step F. FIG. 2 shows a display example on a liquid crystal display 8A in a conventional example.
9 indicates that the vehicle is traveling on the road R.

However, in the above conventional example, when the scale selected in step A is large, as shown in FIG.
Since only a small area around the vehicle position 19 on the Tomei Expressway R is displayed on the screen, the next interchange,
It was not clear how far the service area, parking area, and intersection were from the current location. For this reason, the display scale must be changed by manual operation to switch to the wide area display.

[0009]

As described above, in the conventional example, depending on the selected scale, only a small area map is displayed on the liquid crystal display 8A, and the next interchange, service area, parking area, and intersection are not displayed. In some cases, the map is not displayed, and when the display is to be displayed until the next interchange, there is a disadvantage that the wide area switch button must be manually operated to switch to the wide area map for display.

[0010] The present invention is to eliminate the above conventional drawbacks, at highway, land read out from the storage means
Map based on map data and simplified map based on simplified map data
The simplified map and the display screen of the above display means can be displayed simultaneously.
Detailed information based on the map display,
At the same time, you can easily grasp the outline information by the graphic display
It is an object of the present invention to be in.

[0011]

[0012]

[0013]

Means for Solving the Problems A first invention of the present invention is:
In order to achieve the above object, a vehicle position detecting means for detecting the vehicle position, map data corresponding to the vehicle position detected by the vehicle position detecting means, and a simplified highway
On expressways such as service areas and interchanges
Simplified area for displaying a simplified map showing the adjacency of only the facilities
Storage means for storing diagram data, and reading from the storage means
Map based on the extracted map data and the vehicle position detecting means
Display means for displaying the vehicle position detected in the
Simplified land read from the storage means when driving on a highway
The simplified map based on the figure data is displayed on the display screen of the display unit.
It can be displayed on some parts at the same time, and on this simplified map
To display the position of the vehicle .

[0014] According to a second aspect of the present invention, a display means is provided.
Map with the location of your vehicle and the next facility on the highway
It is characterized by displaying the distance between the two .

[0015]

[0016]

The present invention is configured as described above, and is used for displaying a map.
Detailed map around the location of the vehicle and simplified simplified land
The outline of the wide area around the position of the vehicle is displayed by the graphic display.
Means are displayed at the same time, so detailed information
Information and general information on a wide area around the vehicle position, for example,
Interchange, service area, etc. and the location of the vehicle
The person in charge can grasp at the same time .

Further, in the second invention, the self-display by map display is performed.
Detailed map around car position and simplified simplified map display
Simultaneously displays the outline of the wide area around the vehicle position
Means are displayed on the map, and the location of the vehicle
It shows the distance to the next facility on the road,
The distance to the next facility on the simplified map is easy to grasp .

[0018]

[0019]

An embodiment of the present invention will be described below.
FIG. 5 shows the map display processing which is the basis of the present invention .
In FIG. 5, when the scale of the display map is selected in step A, the figure and the view set are selected according to the selected scale, and the unit corresponding to the own vehicle position is selected. The data is read from the ROM 7 (step B). In the next step C, a map is drawn on the liquid crystal display 8A based on the read map display data. In step D, the road network data recorded in the road layer of the CD-ROM 7 is read, and the road vehicle data on the road network is read from the read road network data and the current position data of the vehicle obtained by the CPU 10. The position and orientation are determined (step E). In the next step F, the own vehicle position and azimuth calculated by the CPU 10 are displayed as the own vehicle mark 19 on the display map. In the next step G, it is determined whether or not the wide area map is to be superimposed on the display screen. When the superimposition display mode is selected by a manual operation, a display scale which is to be displayed in a wide area with respect to the scale of the currently displayed map is automatically selected in step H. In step I, the map data of the selected scale is read from the CD-ROM 7. In the next step J, a wide area small map is displayed on a part of the display screen based on the map display data read in step I. In this case, the location of the wide-area small map is determined by dividing the entire screen of the liquid crystal display 8A into four parts a, b, c, and d as shown in FIG. It is something to arrange. Next, at step K, a wide area small screen is drawn, and at step L, the own vehicle mark 19A is displayed on the map of the wide area small screen. FIG. 6 shows a screen displaying the narrow area map and the own vehicle mark on the entire liquid crystal display 8A, and simultaneously displaying the wide area small map and the own vehicle mark 19A on a portion behind the traveling direction of the own vehicle.
You.

FIG. 8 shows an embodiment of the present invention .
In the present embodiment, a detailed map around the position of the own vehicle is displayed on the liquid crystal display 8A, and a simplified map (deformed map) centering on the currently running road, for example, a deformed map 25 of the currently running highway is displayed. Are displayed in a superimposed manner. In FIG. 8, 26 is a straight line indicating a highway, 27
Indicates facilities such as an expressway parking area (PA), service area (SA), and interchange (IC). The distance between the facilities 27 indicates the distance between the facilities. Reference numeral 28 denotes a vehicle mark, which indicates an approximate position of the current vehicle position.
Indicates the distance between the vehicle mark and the next facility 27 in the traveling direction. By looking at the deformed map, it is easy to know which side of the expressway is currently running, and also to know the distance to the next facility. Note that the deformed figure data in the present embodiment is recorded on the CD-ROM 7, and the deformed figure data corresponding to the current position of the vehicle is read and displayed on the screen. Thus, according to the present embodiment,
The normal map and the highway deformed map are displayed on the display screen simultaneously.
Display, the display is switched by manually operating the switch button.
Detailed information by map display and highway
Specific information by road deformed map display, for example, on highways
Information such as the positional relationship between your facility and your vehicle
It can be grasped. In particular, highway deformation charts
In the figure, the positional relationship between the vehicle position and the facilities on the highway
Easy to grasp, but in what direction your vehicle will move in the future
Although it cannot be grasped, at the same time as the highway deformed map
According to the displayed map, the future direction of the vehicle
It has the advantage that it can be easily grasped. In addition, highway default
According to the lume map display, facilities on the highway, for example,
-At a glance, the positional relationship of changes and service areas
I can grasp, but I can not grasp facilities outside the expressway
The map displayed at the same time as the highway deformation map
According to the display, facilities outside the expressway can be grasped. others
When driving on a highway,
By looking at the diagram display, you can see the vehicle position and the
-It is easy to understand the positional relationship of changes and
After getting off the interchange by looking at the diagram display
Facility for the purpose of, the positional relationship and direction to such destinations
It can be easily grasped .

[0021]

The present invention according to the present invention has a configuration as described above, high
Around the current position while driving on a single display screen while driving on a highway
Detailed map of the location of the vehicle and facilities on the highway
The abbreviation can be easily grasped. In particular, highway differentials
In the Olme map display, the position of the vehicle and the facilities on the highway
Although it is easy to understand the location relationship,
Highway deformation
According to the map displayed simultaneously with the figure, the future
This has the advantage that the traveling direction can be easily grasped. Also fast
According to the road deformed map display, facilities on the highway, examples
For example, the location of interchanges and service areas
Can be grasped at a glance, but facilities outside the expressway are understood
Not possible, but displayed at the same time as the highway deformation map
According to the map display, facilities outside the expressway can be grasped.
You. Therefore, when driving on the highway,
Seeing the deformed map display and your vehicle position
If you can easily grasp the positional relationship of certain interchanges
In both cases, by looking at the map display, the interchange
Relationship to destination facilities, destinations, etc. after getting off
And the direction can be easily grasped .

[Brief description of the drawings]

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

FIG. 2 is a view showing a display example of the liquid crystal display of the embodiment.

FIG. 3 is a view showing a format of a CD-ROM of the embodiment.

FIG. 4 is a view showing road data recorded on a CD-ROM of the embodiment.

FIG. 5 is a flowchart showing the basics of display processing of the embodiment.

FIG. 6 is a view showing a display example which is a basis of the embodiment.

FIG. 7 is a diagram showing a location of a wide area small map which is a basis of the embodiment.

FIG. 8 is a view showing a display example of the liquid crystal display of the embodiment .

FIG. 9 is a flowchart of a display process of a conventional example.

[Explanation of symbols]

 Reference Signs List 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

Continuation of the front page (56) References JP-A-1-152310 (JP, A) JP-A-5-94130 (JP, A) JP-A-4-310985 (JP, A) JP-A-3-194417 (JP) JP-A-3-85582 (JP, A) JP-A-6-68387 (JP, A) JP-A-4-335390 (JP, A) JP-A-6-60296 (JP, A) 4-305116 (JP, A) JP-A-6-265365 (JP, A) JP-A-6-110384 (JP, A) JP-A-2-45412 (JP, U) (58) Fields investigated (Int. Cl. ^6, DB name) G01C 21/00 G08G 1/0969 G09B 29/10

Claims (2)

(57) [Claims] A vehicle position detecting means for detecting a vehicle position, map data corresponding to the vehicle position detected by the vehicle position detecting means, and a service provided on a simplified highway.
Only facilities on expressways such as areas and interchanges
The simplified map data for the simplified map display showing the adjacency of
Storage means for storing, and a map read from the storage means
The map based on the data and detected by the vehicle position detecting means described above
Display means for displaying the position of the host vehicle.
The simplified map data read from the storage means
Simultaneous simple map based on a part of the display screen of the above display means
And the location of the vehicle on this simplified map.
Running position display device and displaying the. 2. A simplified map displayed on a display means includes an own vehicle
The travel position display device according to claim 1, wherein a distance between the position and a next facility on the highway is displayed.