JPS58223015A - Vehicle mounted navigating equipment - Google Patents

Abstract

PURPOSE:To facilitate to recognize another vehicle even through it disappears from sight by transmitting the present position data of own vehicle to the other vehicle, receiving the present position date of the other vehicle, and additionally displaying the two positions on a route map in a running area which is shown by a diaplaying means. CONSTITUTION:X and Y components of geomagnetism corresponding to the advancing azimuth of a vehicle are detected by an azimuth detecting device 1. Map data in a specified area is searched and read from map data in a plurality of areas by a reading device 3. A microcomputer 4 receives the digital signals of the X and Y components from the azimuth detecting device 1, distance pulses from a distance sensor 2, signals read by a reading device 3, and the like. The microcomputer 4 executes operation processing and generates display signals for displaying the road map in the specified area and the data of the route. The present position data of the vehicle is transmitted to the other vehicle by a transmitter 8. Meanwhile, the present position data of the other vehicle is received by a receiver 9.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is an in-vehicle device that displays a road map of the area in which the vehicle is driving, and additionally displays the current position of the vehicle within the area on the road map. It is related to.

Conventionally, this type of device has been equipped with a direction detecting means for detecting the traveling direction of the vehicle, a traveling distance detecting means for detecting the traveling distance of the vehicle, and a cassette tape storing data on various driving areas. A road map of a specific driving area is displayed on a cathode ray tube (hereinafter referred to as CRT) using the map data successively transmitted from the tape, and the current position calculated based on the signals from the direction detecting means and the traveling distance detecting means is displayed on the road map of the CRT. There are additional items to be displayed above.

However, this system only allows you to know the current position of your own troops within the driving area, and if you depart somewhere with another vehicle and then lose sight of the other vehicle, However, the presence of other vehicles could not be detected using the above device.

The present invention has been made in view of the above problem, and is directed to a device equipped with a display means that displays a road map within a driving area together with the current location. a transmitting means for transmitting information to the vehicle; a receiving means for receiving information indicating the current position of another vehicle within the driving area; and a receiving means for receiving information indicating the current position of the other vehicle in the driving area; This device is also installed in other vehicles, and the transmitting means and the receiving means transmit and receive information on each other's current positions, so that each vehicle can display the current positions of other vehicles. The object of the present invention is to provide an in-vehicle navigator that can display the current location of the vehicle.

The present invention will be described below with reference to embodiments shown in the drawings.

FIG. 1 is an overall configuration diagram showing one embodiment.

In Fig. 1, reference numeral 1 denotes a direction detection device, which includes a direction sensor that detects the X and Y components of the earth's magnetism according to the direction in which the vehicle is traveling, and an A/D converter that converts the signal from this direction sensor into a digital signal. X according to the direction of travel of the vehicle,
It generates a Y component digital signal. , 2 is a distance sensor, which measures the vehicle's unit mileage (for example, about 39.2
A distance pulse is generated every Cm). 3 is a reading device which (3) reads map data of a specific district from a cassette tape 3a which stores map data of multiple districts (including absolute coordinate data of two points on the right side of each map); It is something that is searched and read.

4 is a microcomputer that executes software digital arithmetic processing according to a predetermined control program, and includes a CPU 4 a, a ROM 4 . b, RAM 4c, I10 circuit section 4d, and receives power from the on-board battery.
■ Stabilized power supply circuit that generates the stabilized voltage (not shown)
It enters the operating state after being supplied with a stabilizing voltage from the direction detector 1, and receives digital signals of the X and Y components from the direction detection device 1, distance pulses from the distance sensor 2, read signals from the reading device 3, etc., and performs arithmetic processing. and generates display signals for displaying road maps and driving route information for specific areas. Note that the RAM4C is constantly backed up with power from the vehicle battery.

5 CRT controller, microcomputer 4
In response to the display signal from the map data (4) evening of the specific area, the driving route information and character data are individually stored, and the stored map data, driving route information, or character data are displayed on a CRT. It generates video signals and synchronization signals. Reference numeral 6 denotes a CRT display device as a display means, which displays a map and driving route of a specific area in C and RT using the video signal and synchronization signal from the CRT controller 5. Reference numeral 7 denotes a touch panel section, which is attached to the display surface of the CRT display device 6, and generates a serial signal in response to a touch operation on a specific touch area among the 12 divided touch areas provided on the touch panel. It is something.

Reference numeral 8 denotes a transmitting device as a transmitting means for transmitting information indicating the current position of the vehicle (a map number described later and X, Y coordinate data with respect to a map of the driving area) to other vehicles. Based on the input data, the data is converted into a transmission signal and modulated to a transmission frequency specific to this vehicle, thereby transmitting the information (5) above from the antenna installed on the vehicle to other vehicles. It is sent by Reference numeral 9 denotes a receiving means for receiving information (map number and X, Y coordinate data) that does not indicate the current position of another vehicle. It receives only the signal (signal transmitted) from an antenna installed on the vehicle, demodulates it, converts it into a digital signal, and outputs it to the microcomputer 4. 10 is a keyboard, as shown in FIG. O~ to specify the unique frequency of another vehicle
9 number key and decimal point key (reset type), and a holding type communication mode that generates a signal to start transmission and reception when turned on and also supplies power to the transmitting device 8 and receiving device 9. key, a reset type clear (CL) key for clearing the key operated frequency value, and a retention type entry (ENT) key for manually registering the key operated frequency value.

Next, the detailed electrical connection diagram of the CRT controller 5 shown in FIG. 3 will be explained. 11 is an oscillation circuit that generates an oscillation signal of 12° (6)
divides the oscillation signal from the oscillation circuit 11 to 6.048M
A dot counter 13 generates a dot timing clock of llz and a character timing clock of 756 KHz, and a dot counter 13 generates a horizontal and vertical synchronization signal, a refresh memory address signal, and a raster by an instruction (command) from the microcomputer 4 and a character timing clock from the dot counter 12. a display controller that generates an address signal; 14 is a horizontal signal from the display controller 13;
This is a hold signal generation circuit that generates a hold signal to a hold terminal of the microcomputer 4 to hold the microcomputer 4 during a display period based on a vertical synchronization signal. 15 receives the address signal from the microcomputer 4, the fresh memory address signal and the raster address signal from the display controller 13, and the hold address signal from the microcomputer 4 (
A multiplexer that switches by the HOLDA) signal,
16.17, Engineering 8 is a bus driver with a tri-state that switches the direction of data between the microcomputer 4 and the display memory (7), and 19 is a bus driver that stores and displays display data such as ASCII code from the microcomputer 4. A character memory receives a refresh memory address signal from the controller 13 and outputs its contents as an address, and 20 is a character frame generator that outputs a display pattern based on a display address from the character memory 19 and a raster address signal from the display controller 13. be. 21 is a first graph ink memory that stores map data from the microcomputer 4; 22 is a second graphic memory that stores travel route information (travel trajectory data, current position data) from the microcomputer 4; 23.24 .25 is character generator 2
0, a parallel-to-serial (P-+S) converter that converts the parallel signals from the first and second graphic memories 21 and 22 into serial data using the dot timing clock from the dot counter 12; The reception of the signals from the P-hS converter 23 and the P-3 converter 24, 25 is switched in order to select the graphic (8) and character screen by the screen switching signal, and the video signal is changed by the display timing signal from the display controller 13. 27 is an exclusive OR circuit that generates a synchronizing signal using the horizontal and vertical synchronizing signals from the display controller 13. Note that the character memory 19 and the first and second graphic memories 21 and 22 are constantly backed up with power from an on-vehicle battery.

That is, in this CRT controller 5, based on the data sent from the microcomputer 4, character data is stored in the character memory 19, map data is stored in the first graphic memory 21, and display data of the travel trajectory and current position is stored in the second graphic memory 19. Always stored in the memory 22,
The screen switching signal from the microcomputer 4 selects the graphic screen (displaying the travel trajectory and current position on the map) and the character screen (displaying specified characters, etc. to specify the district). (9) A video signal and a synchronization signal for displaying the corresponding screen on the CRT are generated in the CR7 display device 6.

Further, the touch panel section 7 has three parts as shown in FIG.
It has 12 touch areas numbered 1 to 42, and is composed of two pieces of glass and a transparent conductive film formed in a matrix on each glass.When a specific touch area is pressed, the glass Deflections and dents are detected by contact of the transparent conductive film of the matrix due to deflection, and a serial signal (consisting of a start signal and a touch information signal) corresponding to the detected touch area is generated by a touch signal generation circuit (not shown). There is. Note that this touch signal generation circuit generates touch information at that time in the form of a serial signal every 40 m5ec.

Furthermore, FIG. 5 shows the theta area portion corresponding to one district on the cassette tape 3a, and A stores the absolute coordinate data (coordinates with respect to the North Pole) of the upper right point of the map of that district and the map number. B is the map data storage section that stores the map data of the area, X
is the blank part (10). Therefore, by reading portions A and B with reading bag W3, map data, map number, and absolute coordinate data of a specific area can be given to microcomputer 4.

The operation of the above configuration will be explained with reference to the display explanatory diagram of FIG. 6 and the calculation flowcharts shown in FIGS. 7 to 1I. FIG. 7 is a calculation flowchart showing the overall calculation processing of the main routine of the microcomputer 4, FIG. 8 is a calculation flowchart showing the calculation processing of the interrupt calculation routine based on the distance pulse from the distance sensor 2, and FIG. Calculation flowchart showing detailed calculation processing of the mode calculation routine in Fig. 7, 1st θ
7 is a calculation flowchart showing detailed calculation processing of the current position calculation routine in FIG. 7, and FIG. 11 is a flowchart showing detailed calculation processing of the communication mode calculation routine in FIG.

Now, in a vehicle equipped with components 1 to 10 shown in FIG. 1, when a key switch is turned on at the start of operation, each part of the electrical system is activated by receiving power from the vehicle battery. Then, the microcomputer 4 receives the stabilized voltage of 5■ from the stabilized power supply circuit and enters the operating state, starts its arithmetic processing at the start step 100 in FIG. 7, and proceeds to the initial setting routine 200. The registers, counters, latches, etc. in the microcomputer 4 are set to initial states necessary for starting arithmetic processing. After this initial setting, the mode calculation routine 30
The calculation process of the communication mode calculation routine 600 is repeatedly executed from 0 at a predetermined period.

That is, in this mode calculation routine 300, one of the map mode and character mode is selected, and the content corresponding to that mode is displayed on CR'r, and when the map mode is selected, the cursor indicating the current position can be moved. , when in character mode, executes calculation processing that allows map designation of a specific area, and executes current position calculation routine 4.
Go to 00. - In this current position calculation routine 400, C
Second graphics memory 2 in RT controller 5. 112, the current position data and traveling trajectory data are X.

Arithmetic processing is executed to change the content with a travel change of ±50 m for each Y component, and the process proceeds to communication mode calculation routine 600. In this communication mode calculation routine 600, the current positions of the own vehicle and the other vehicle are transmitted and received, and calculation processing for displaying the current position of the other vehicle on the CR7 display device 6 is executed, and the process returns to the mode calculation routine 300. Thereafter, the calculation process of the main routine from this mode calculation routine 300 to the communication mode calculation routine 600 will take several tens of m5ec.
Execute repeatedly at a certain frequency.

When a distance pulse from the distance sensor 2 is applied to the interrupt (INT) terminal of the microcomputer 4 in response to the repeated calculations of this main routine, the microcomputer 4 temporarily suspends the calculation processing of the main routine. The interrupt calculation process shown in FIG. 8 is executed. That is, the arithmetic processing is started from the interrupt start step 501, and the process proceeds to the integration step 502, where unit distance data (corresponding to about 39.2 Gm) is integrated into the distance data D stored in the RAM 4G and updated. Proceeding to judgment step 503, the distance (13
) Determine whether the distance data D has reached 6.25 m.

At this time, if the distance data D has not reached 6.25 m, the determination will be NO and the process will proceed to return step 510, but if the distance data D has reached 6.25 m, the determination will be Y.
The state becomes ES, and the process proceeds to direction signal input step 504. Then, in this direction signal input step 504, digital X and Y component signals xa, Ya (
East and north are positive directions, west and south are negative directions), and proceed to average direction calculation step 505, where the previous direction data Xo, Y
.

(The azimuth data before traveling 6.25 m) and the current azimuth data Xa, Ya to calculate the average azimuth data X, Y, and proceed to distance component calculation step 506, where the distance component Dx in the X direction is calculated as 6, 25 X/ n Y-direction distance component D
y to 6. cos θ for the sought angle θ as zsy/F,
(equivalent to Y/, r mahe = maishi ma sin θ), the process advances to storage step 507 and the current orientation data Xa, Ya is stored as Xo, Y for the next time.

and distance data reset step 50 (14
) Proceed to Step 8 to reset the distance data D to O, proceed to Distance Flag Set Step 509 to set the distance flag,
The process advances to return step 510 to return to the previously interrupted main routine. That is, in this interrupt calculation routine, the distance data D is cumulatively updated every time a unit distance is traveled, and when the distance data D reaches 6.25 m, this 6.25
X for m.

The distance components Dx and Dy in the Y direction are calculated, and arithmetic processing is executed to cent the distance flag.

Next, mode calculation routine 30 in the main routine
Detailed calculation processing of 0 will be explained. In this mode calculation routine 300, the calculation process is started from touch data input step 301 in FIG. 9, and touch data from the touch panel unit 7 is input and stored in the RAM 4C. Then, the process proceeds to map mode determination step 302 and the RAM 4
It is determined whether the contents of the mode area in C are map mode or not, and when it is map mode, the determination becomes YES, and the process proceeds to mode change determination step 303, where RAM 4 is
It is determined whether the touch area stored in C is data indicating a mode change (data when touch area 34 in FIG. 4 is pressed). At this time, if the touch data is data indicating a mode change, the determination is YES.
S, the process advances to character mode setting step 304 to set the contents of the mode area to character mode, and the process advances to character switching signal output step 305 to set CR.
7 A character switching signal for displaying a character screen on the display device 6 is generated to the video controller 26 in the CRT controller 5, and this mode calculation routine 3
One calculation process of 00 is completed.

On the other hand, when the touch data is not data indicating a mode change, it is data when a touch area other than 34 in FIG. 4 is pressed, or data when no touch area is pressed (for example, FF data), the determination in the mode change determination step 303 becomes NO, and the process proceeds to the cursor e movement determination step 306. In this cursor movement determination step 306, it is determined whether the touch data is data when any of the touch areas 32, 33, 35, 38, 40, 41 is pressed (cursor movement data). If the touch data is not cursor movement data, the determination becomes NO and one calculation process of this mode calculation routine 300 is completed, but if the touch data is cursor movement data, the determination becomes YES. Cursor movement calculation step 30
Proceed to step 7.

In this cursor movement calculation step 307, in accordance with the touch data, the cursor at the current position displayed on the CR7 display device 6 is moved in a predetermined north direction, indicating that this touch data is data for pressing the touch area 32 or 33. The contents of the second graphic memory 22 in the CRT controller 5 are changed so as to move the cursor by the distance, and similarly, if the touch data is data for pressing the touch area of 35, the cursor is moved westward, and the touch data is 40 or 41. If the touch data corresponds to the press of the touch area 38, the cursor is moved south by a predetermined distance, and if the data corresponds to the press of the touch area 38, the cursor is moved east by a predetermined distance. The arithmetic processing for changing the contents of the graphic memory 22 is executed, and one arithmetic processing of this mode arithmetic routine 300 is completed.

On the other hand, if the determination in the map mode determination step 302 is NO.
In this case, the process proceeds to mode change determination step 308, and it is determined whether or not the mode is to be changed using the same arithmetic processing as in mode change determination step 303. child.

In this case, if the determination is YES when changing the mode, the process proceeds to a map mode setting step 309 to set the contents of the mode area C in the RAM 4 to the map mode, and proceeds to a data conversion step 310 to change the second mode in the CRT controller 5. Converts the travel route data in the graphic memory 22. In this case, first, the reading device 3 is controlled to search for a designated area using the map number, and the absolute coordinate data (stored in the header A shown in Fig. 5) of the searched map and the absolute coordinate conversion value of the previous map are used. is calculated, and the traveling locus and current position data (X, Y coordinate data) in the second graphic memory 2 (18) 2 are converted so as to slide according to the calculated values. Then, the process proceeds to map data reading and output step 311, where the cassette tape 3a
input the map data through the reading device 3, output the map data to the first graphic memory 21, and proceed to the map switching signal output step 312 to display the graph ink screen of the map on the CR1 display device 6. A map switching signal is generated to the video controller 26, and one calculation process of this mode calculation routine 300 is completed. That is, when switching from the character screen to the graphic screen of a map different from the previous one, the above calculation process is executed, the current map data is stored in the first graphic memory 21, and the travel trajectory is set to the current position corresponding to this map. and converting the contents in the second graphics memory 22 to modify the cursor indicating the current location. As a result, even if the map displayed on the CR1 display device 6 changes, the travel trajectory and current location can be displayed in the area corresponding to the map. Note that X indicating the current position,
Y coordinate data is always stored in RAM4C.

On the other hand, if the determination in the mode change determination step 308 is NO.
If so, the process advances to character calculation step 313. When the character calculation step 313 is reached, the character mode is set and a character switching signal is being issued to the video controller 26.
The CR1 display device 6 displays a character screen as shown in FIG. The numbers 02-4-68 shown in the center of this character screen are numbers that designate regions, areas, and districts, that is, map numbers, and each number is updated by adding one by one with the increment switch 51, and the number is updated with the increment switch 51. The character calculation step 313 performs arithmetic processing such that the character is updated by one by one, set by the set switch 53, and reset by the reset switch 54. Note that the numerical data of this region, area, and district is stored in the RAM 4C. Further, the aforementioned switches 51, 52, 53, and 54 respectively correspond to the touch areas 39, 40, 41, and 42 in FIG.

That is, the mode calculation routine 300 shown in FIG.
Now, touch data from touch panel section 7 and RAM 4
According to the contents of the mode area in G, as shown below ■~
■ Perform the operation.

- If there is a cursor movement instruction when the map mode is on and the mode is not changed, arithmetic processing for cursor movement is executed, and if there is no cursor movement instruction, the map display is continued as is.

■If you are instructed to change the mode while in map mode, if you change the map mode to character mode - both CR
1 Display a character screen on the display device 6.

■When in character mode and not changing modes, the 6th
It is possible to accept changes to the map on the character screen as shown in the figure.

■If there is an instruction to change the mode while in the character mode, the character mode is changed to the map mode, a rough map screen (21) of the map is displayed on the CRT display device 6, and the travel trajectory and current position are also corrected at the same time. Display.

Next, the current position calculation routine 4 in the main routine
The detailed arithmetic processing of 00 will be explained. In this current position calculation routine 400, the calculation process starts at distance flag determination step 401 in FIG. 10, and it is determined in the interrupt calculation process in FIG. 8 whether or not the distance flag is set. At this time, if the distance flag is not set, the determination will be NO and one calculation process of this current position calculation routine 400 will be completed, but if the distance flag is set, the determination will be YES and X Distance correction step 4
Proceed to 02. Then, in this X distance correction step 402, the X distance data DX is corrected by the X distance component Dx obtained by the interrupt calculation process (DX=DX+Dx), and Y
In the distance correction step 403, the Y distance data DY is similarly corrected (DY = D, Y + D y ) L,
Proceeding to the first X distance determination step 404, it is determined whether the X distance data DX has reached a value of 50 m or more. At this time, if the width of the X distance (22) data DX is 50 m or more, the judgment is YES.
Then, proceed to the X distance subtraction step 405, subtract the value of 50 m from the X distance data DX, and proceed to the display movement step 40.
Proceeding to step 6, the current position data in the second graphic memory 22 is moved by 50 m in the positive direction (eastward), and the travel locus data is also caused to follow this. Note that when changing the current position data, the
Also change the coordinate data.

Further, the determination in the first X distance determination step 404 is N
If o, the process proceeds to a second X distance determination step 407, where it is determined whether the X distance data DX has reached a value of 150 m or less. At this time, if the X distance data DX has a value of 150 m or less, the determination becomes YES, and the process proceeds to the X distance addition step 408, where the value of 50 m is added to the X distance data DX, and the process proceeds to the display movement step 409. Change the current position data in the second graphic memory 22 by 50 m in the negative direction (
When the vehicle is moved in the west direction), the travel locus data is also made to follow this movement. Note that when changing the current position, the X coordinate data in RAMdC is also changed.

Then, when the judgment in the second X distance judgment step 407 is No, or after the display movement steps 406 and 409, the process proceeds to the Y component display movement processing routine 410, and the Y distance data DY calculated in the Y distance correction step 403 is , the same determination and calculation processing as in steps 404 to 409 described above is performed.

(When the Y distance data DY reaches a value of 50 m or more in either the positive or negative direction, the current position data and travel trajectory data in the second graphic memory 22 are moved by 50' in the corresponding direction.) When changing the current position data, the Y coordinate data is also changed.

Then, the process advances to step 411 to reset the distance flag.

1, that is, the current position calculation routine 4 shown in FIG.
00, the current position data and travel trajectory data in the second (7)' graphic memory 22 are changed regardless of the screen displayed on the CR7 display device 6, and at the same time, the X and Y data in the RAMdC are changed. Also change the coordinate data.

Therefore, the current position data and traveling trajectory data in the second graphic memory 22 are sequentially changed by the calculation processing by the mode calculation routine 300, the current position calculation routine 400, and the interrupt calculation processing shown in FIG. The screen of the CR7 display device 6 is selected according to the specified mode, and if the map mode is selected, the map graphic memory screen (including display of the current position and travel trajectory) is displayed, and if the character mode is selected, the screen shown in FIG. 6 is displayed. A character screen for map specification is displayed.

Next, the calculation processing of the communication mode calculation routine 600 in the main routine will be explained. First, when the communication mode calculation routine 600 in FIG. 11 is reached, it is determined in a communication mode determination step 601 whether or not a signal is generated by pressing the communication mode key from the keyboard 10, and it is determined that the signal is not generated. Sometimes, the judgment becomes No and one calculation process of this communication mode calculation routine (25) Chin 600 is completed without performing calculations below C, but when the above signal is generated, the judgment becomes YES. Then, the process proceeds to frequency data input step 602. By the way, when the communication mode key is turned on and held, power is supplied to the transmitting device 8 and receiving bag W9, and each enters the operating state. In this frequency data input step 602, the keyboard 10 Every time this step 602 is reached, the frequency value unique to the other vehicle whose key is operated is monitored, and calculation processing is performed to manually memorize the value of each digit in sequence.Then, the next CL key determination step 60
In step 3, it is determined whether or not a signal is generated from the keyboard 10 when the CL key is operated, and if the CL key is operated due to the frequency being input manually, the determination becomes YES. , the process advances to clear step 604 and all frequency data stored up to that point is cleared. On the other hand, if the determination in the CL key determination step 603 is NO.
If so, proceed to the next E N T key determination step 605,
It is determined whether a signal is generated when the ENT key is operated from the keyboard 10, and the determination becomes No while the ENT key (26) is not operated. E to register frequency data
When the NT key is pressed and held, the determination becomes YES. Then, the process proceeds to a frequency data output step 606 to output the registered frequency data to the receiving device 9 and hold it, and the process proceeds to an own force position data output step 607 to obtain data indicating the own force's position, that is, the map number and current position. The X and Y coordinate data of the vehicle is output to the transmitting device 8, and the process proceeds to another vehicle position data input step 608, where the information from the other vehicle received by the receiving device 9 (based on a signal tuned to a specified frequency) is manually input. do. If this manually inputted information is not valid data, that is, information indicating the current position has not yet been sent from another vehicle, the determination will be NO, but if it is valid data, the determination will be YES. Then, the process proceeds to the next map number determination step 610, where the map number based on the information sent from the other vehicle is compared with the map number of the map displayed by the own army, and it is determined that both vehicles are in the same driving area. If a map with the same map number is being displayed, the determination is YES and the process proceeds to step 611 for displaying the position of another vehicle. In this other vehicle position display step 611, a second control is performed in the CRT controller 5 to display the point on the CR7 display device 6 as an X mark (see FIG. 1) based on the previously input X and Y coordinate data of the other vehicle. Write display data into the graph ink memory 22. Note that if the position of the other vehicle moves during the writing, the previous display data is erased and new display data is written.

Therefore, by repeatedly executing the calculation process of this communication mode calculation routine 600, the current position information of the own force is transmitted to other cars, and the current position information of other cars is received, and the current position of the other car is determined by CR7. An X mark is displayed on the display device 6.

In addition, in the above embodiment, the current location information is expressed as the map number and X,
Although we have shown what is sent and received as Y coordinate data, the current position is converted to absolute coordinate data for a specific point such as the North Pole, and then sent and received, and when displayed, it is converted to coordinates within the map and displayed. You can do it like this.

Also, although we have shown a case in which the other vehicle is not displayed when no other vehicle is in the same driving area, it may also be possible to display the other vehicle's position at a position at the edge of the screen that indicates the direction of the other vehicle. .

Further, the position of the other vehicle does not have to be an X mark, but may be any other symbol.

Furthermore, a direction detection device 1 for detecting the geomagnetic field detects the traveling direction of the vehicle.
Although a gyroscopic type that relatively detects the traveling direction of the vehicle is shown, it is also possible to use a gyro type that relatively detects the direction of travel of the vehicle.

Furthermore, although the control is performed by software using the microcomputer 4, a hard logic configuration using an electronic circuit may also be used.

Further, although a CRT is used as the display means, it may be possible to use a liquid crystal, EL, etc., and the current position, its trajectory, and the position of other vehicles are displayed using a CRT display or the like, and the display is displayed on the front of the display. A transparent sheet with a road map printed thereon may be placed on the vehicle, so that the current location, its trajectory, and the location of other vehicles can be additionally displayed on the road map.

(29) As described above, in the present invention, a device equipped with a display means for displaying a road map in a driving area together with a current position transmits information indicating the current position of own troops to other vehicles. means, a receiving means for receiving information indicating the current position of another vehicle within the driving area, and means for additionally displaying the current position of the other vehicle on the road map of the display means based on the information received by the receiving means. By installing this device in other vehicles, the transmitting means and receiving means can transmit and receive information on each other's current positions, and each vehicle can display the other vehicles' current positions together with their own troops' current positions. This has the excellent effect that if you are leaving somewhere with another vehicle, you can easily recognize the other vehicle's driving position by displaying it on your own display means even if you lose track of the other vehicle. There is.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing an embodiment of the present invention, FIG. 2 is a configuration diagram of the keyboard in FIG. 1, and FIG. 3 is a C diagram in FIG. 1.
Connect a' of the RT controller with a fine electrical connection (30). Figure 4 shows the touch panel glue 7 of the touch panel section.
FIG. 5 is an explanatory diagram showing the data area of the cassette tape, FIG. 6 is an explanatory diagram showing the CRT display state, and FIGS. 7 to 11 are the calculations of the microcomputer in FIG. 1. It is a calculation flow chart showing processing. ■... Direction detection device, 2... Distance sensor, 3a...
- Cassette tape, 3...reading device, 4...microcomputer, 6...CRT display device as display means. 8... A transmitting device as a transmitting means, 9... A receiving device as a receiving means. Representative Patent Attorney Takashi Okabe (31) Figure 4 Figure 5 Figure 6 Figure 7 Figure 5 Figure ζn1 Figure 9 Figure 10 Figure 11

Claims (1)

[Scope of Claims] An in-vehicle navigator equipped with a display means in the vehicle interior for displaying a road map of the area in which the vehicle is traveling and additionally displaying the current position of the vehicle within the area on the road map, comprising: a transmitting means for transmitting information indicating the current position of the vehicle (hereinafter referred to as own force) to other vehicles (hereinafter referred to as other vehicles); a receiving means for receiving information indicating the current position of other vehicles within this driving area; An in-vehicle navigator comprising means for additionally displaying the current position of another vehicle on the road map of the display means based on the information received by the receiving means.