JPS5830615A - Device for displaying own position - Google Patents

Abstract

PURPOSE:To make a driver acknowledge the pressure position readily, by displaying a map indicating an area wherein a moving body is running and the present position in a superimposed mode on the display device which is mounted on the moving body. CONSTITUTION:In the position display system 100, GPS radiowaves trasmitted from artificial satellites S1-S3 are received by a receiver 1. The own position data is computed from the received data by a position detecting device 2. The driver operates a keyboard 3 and displays the map and the present position on an image display device 4. Message data is converted into an audio signal by an audio output device 6 and imparted to a speaker 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a self-position display device, and more particularly to a self-position display device mounted on a moving object such as an automobile.

Conventionally, drivers of vehicles such as automobiles have recognized their current location from their surroundings or road signs. Furthermore, in areas where traffic information is well managed, the current location information of a vehicle can be reported from a specific system, such as a vehicle integrated control system. However, in areas where there is no traffic control organization or in areas where road signs are unknown to drivers, it may become difficult to know which point or direction the driver is driving.

The present invention has been made in view of the above reasons, and provides a self-location display device that can display a map showing the area in which the user is moving and the current location overlappingly on a display device mounted on a moving object. It is something to do.

Hereinafter, details of the present invention will be explained with reference to the drawings.

FIG. 1 is an overall system configuration diagram showing one embodiment of the present invention.
Positioning System) A satellite that generates radio waves, 100 is mounted on a moving vehicle,
This shows a location display system that uses radio waves from satellites to detect your location and display it on a map. Position display system 1
00 is a receiver l that receives GP8 radio waves, a position detection device 2 that calculates own position data from the received data, a keyboard 3 that is operated by the driver, and an image display that displays a map and current position. The system includes a device 4, a speaker 5 for generating an audio signal, and an audio output device 6 for converting message data into an audio signal and providing it to the speaker. Each of these elements is a data bus (control line).

20 (including address lines), it is connected to a data processing device 10 consisting of a programmable microcomputer, for example. The data processing device 10 includes:
Map data, which will be described later, is stored in a continuous access memory 11 for storing programs and various fixed data and a random access memory for temporarily storing various control data via a data bus 20. A disk memory 13 is connected thereto. Similarly, an interface device is interposed between the data bus and each element, but it is omitted in the drawing. In this example, the keyboard 3 has four buttons: a wide area map designation button 3A, and a medium area map designation button 3B.
, narrow area map designation button 3C1 and voice command button 3
Contains D.

FIG. 2 is a diagram showing a schematic 70° chart of a program executed by the data processing device 10. As shown in FIG. The data processing device 10 executes a routine 24 in response to an interrupt signal 22 output when the driver operates the keyboard 3, and reads a key manual signal. As a result, the parameters corresponding to the designated buttons 38 to 3D are set. Further, the data processing device 10 is configured such that the position detection device 2 is a GPS
'! The programs shown in routines 25 to 60 are executed in response to an interrupt signal 21 output every time position data is calculated from a wave. The position data output by the position detection device 2 is a value indicating the current position in latitude and longitude on the earth, and in the routine 25, these latitude and longitude data are converted into map coordinates (Xi, Yi) corresponding to the map format. ).

For example, when displaying a map using the Mercator method, the radius of the earth is R, and by executing the formula Xl-R (longitude), the equator and any meridian can be
, it is possible to obtain map coordinate data with the Y axis as the Y axis.

When the conversion processing of the position coordinates is completed in routine 25, the map data including the above-mentioned position coordinates is searched for and output to the display device 4 in routine 30, and in routine 40, a mark 4 indicating the current position is superimposed on this map. Performs data processing to output -. Further, a determination routine 50 determines whether the driver has issued a voice guidance command, and if the guidance parameter is set, routine 6
0 and performs data processing to output audio guidance regarding the current location and direction of travel. By periodically issuing an interrupt from the position detection device 2, the above-described program operation can be repeatedly executed.

The display device 4 has a wide range and a middle range, for example, as shown in FIG.

Display narrow area map 7OA-70C. In this example, the enlarged shaded area of the wide area map 7OA is the medium area map 70B.
The enlarged shaded area of 70B is narrow area map 70.
It is C. In order to display a map of a specified size including the current location, the present invention uses, for example, the map shown in Figures 4~(C
Tables 80A, 5o13, and 80C for searching map data are prepared in the memory 11 in the format shown in FIG.

80A is for wide area map search, go)3 is for medium area map search,
80C is a table for narrow-area map search, and each table includes map ranges XI, X2, . Column 81 that describes data indicating Yl, Y2 (see part 3) and the center coordinates of the map (
Xc + Yc) + storage address of the map data in the memory 13, vertical and horizontal dimensions of the map (△X, ΔY
), a field 82 in which a code for specifying the name of the map for audio guidance stored in the audio output circuit 6, serial number data of the map, and a pointer indicating the top address of the lower map search table are written. It consists of.

FIG. 5 shows a more detailed flowchart of the map data output processing routine 30 for reading out predetermined map data using the above search table.

Destination-1” step 301 wide area map search table 80A
The map range field 81A is searched to find a record containing the coordinate-converted current position (Xi, Yj). Next, in judgment step 302, the wide area map specification parameter P3A is -
1- or not, and if this parameter is set to @ill, the process advances to determination step 306; otherwise, the process advances to step 303, and the intermediate area map search table 90 is
Search for a record containing position (Xi, Yi) from B. One wide-area map is divided into a plurality of mid-range maps, and the start addresses of a plurality of records corresponding to the plurality of mid-range maps are recorded in column 92A of the wide-area search table. Therefore, the mid-range map search can be performed by searching the mid-range map search table 90B indicated by the pointer address in the column 92A. After searching for a mid-range map record in step 303, it is determined in determination step 304 whether the mid-range map designation parameter PaB is @1s. If it is set to @III, the search ends and the process proceeds to determination step 306; if not, the process proceeds to step 305 to search for a record corresponding to the position (X, Y) in the narrow area map table 90C. This search of table 90C is performed in the same manner as step 303 according to the pointer address in column 92B.

The determination step 306 is performed by outputting to the display device 4. If there is no change in the displayed map, this routine ends; if there is a change, the process proceeds to step 307, accesses the memory 13 according to the map data storage address in the record, and reads out the map data. This map data is output to the display device 4 in step 308,
At step 309, the map number is stored in the parameter area, and this routine ends.

FIG. 6 shows the detailed procedure of the position data output processing routine 40. In this routine, in order to superimpose the current position mark 41 on the displayed map screen, first in step 401, the current position (Xi, Yi) is converted to the screen position coordinates [Xd (i), Yd (i Convert Here, I
) x and Dy are the center position coordinates of the display screen.

Ex, By are the horizontal and vertical dimensions of the display screen, (X
c.

Yc), (c, ΔY) are tables 80A to 80C
This value indicates the center and map dimensions of the map shown in .

The current position coordinates on the screen obtained in the previous process are [Xd(i
-1), Yd(鳳-])], then the vector V indicating the direction of movement of the vehicle is -(Xd(il-Xd(it), Yd(il
−Yd(i−t) ] (3). Steps 402-403 are a part that calculates the traveling direction vector using the previous position data read from the parameter area, and step 404 outputs the direction mark 4' to the display device 4 based on the coordinates and vector. Then, in step 405, the position coordinates Xd(il, Yd(il) are stored in the parameter area, and this routine ends.

FIG. 8 shows a detailed flowchart of the routine 60 executed when the driver presses the guidance command button 3D.

For example, the voice guidance may be: [Currently heading in the direction of C in Tanbe in area A. ” (to generate)

In this case, the voices corresponding to A, B, and C are the map name, current position, and traveling direction shown in FIG. , C, the desired audio output can be obtained.

Among these, map name A is map search table 90A-9.
It can be specified by the map name code included in each record in 0C. 1. Current position B can be determined by dividing the map screen into nine blocks as shown in Figure 9, and determining the current position coordinates (
What is necessary is to calculate which block Xd(il, Yd(il) corresponds to) and give the audio designation code corresponding to the corresponding block to the audio output circuit.

Regarding the traveling direction CK, a direction code corresponding to the direction vector {circle around (2)} from the central block to each peripheral block in FIG. 9 may be given to the audio output circuit. 7th
In the flowchart shown in the figure, in step 601S603, the codes of the voices corresponding to A, B, and CK (sound storage addresses may also be used) are determined, and in step 604, these are given to the voice output circuit 6.

As is clear from the above description, the present invention detects the position of a vehicle while it is running and displays the current position on a map. This has the advantage that drivers can easily recognize their current location while driving in areas where it is difficult to check external signs. In the same embodiment, the current position is detected by receiving GP8 radio waves, but the present invention may be implemented using means other than satellites.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing one embodiment of a self-position display system according to the present invention, FIG. 2 is a schematic flowchart of a program executed by a data processing device constituting the system, and FIGS. 3(A) and (B) ), (l Diagram showing the relationship between wide-area, medium-area, and narrow-area maps displayed on a display device, Figure 4-(AJ, (11, (C1) are examples of tables for searching maps, respectively. Figures 5 to 7 are flowcharts showing the details of the processing routines 30, 40, and 60, respectively. Figure 8 is a diagram for explaining the contents of voice guidance, and Figure 9 is a diagram showing the current state of voice guidance. 1 is an explanatory diagram of position classification. In FIG. 1, 1 is a receiver, 2 is a position detection device, 3 is a keyboard, 4 is a display device, 5 is a speaker, 6 is an audio output circuit, 10 is a data processing device, 11.12.13 indicates a memory device. 2nd item

Claims (1)

[Claims] 11. A position detecting means for detecting one's own position, a storage means for storing a plurality of map data, an image height display means, and a map corresponding to the current position outputted from the above position detecting means. 1. A self-position display device mounted on a moving body, comprising control means for retrieving a current position from a map data storage means, superimposing the current position on a map, and outputting the same to the above-mentioned image display means. 2. The self-position display device according to item 1, wherein the position detecting means comprises means for receiving radio waves from an artificial satellite and means for detecting current position coordinates from the received radio waves.