JPH08115498A - Device for displaying running position - Google Patents

Abstract

PURPOSE: To enable also position information of another vehicle to be displayed in a display device by providing a transmitting/receiving means transmitting detecting its own vehicle position data and receiving another vehicle position data. CONSTITUTION: It is judged whether or not another vehicle position information is to be displayed. The judgement is executed by operating the another vehicle switch of a touch pannel 8B. When it is judged that another vehicle switch has been operated, the state becomes a reception one. A transmitting/receiving machine 21 stores vehicle position information (vehicle identifying data, lattitude data and longitude data) from another vehicle in an internal storage area. Then, stored another vehicle position information (vehicle identifying data, lattitude data and longitude data) is read out in a liquid crystal display 8A where its own vehicle position and the present running map are already displayed, the vehicle position is calculated from lattitude and longitude data and vehicle identifying data is made into a mark so as to be superimposed on a previously displayed screen and displayed.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art FIG. 8 shows an outline of a vehicle-mounted traveling position display device. In FIG. 8, 1 is a direction sensor,
The direction sensor 1 uses a geomagnetic sensor for detecting the absolute traveling direction of the automobile and an optical gyro for detecting the relative traveling direction of the automobile. Reference numeral 2 is a distance sensor that generates a pulse according to the number of rotations of the wheel, and 3 is various sensor signals such as an ON / OFF signal of a brake switch and a parking switch, and a power supply voltage monitoring signal. Reference numeral 4 is a sensor signal processing unit that processes sensor signals from the azimuth sensor 1, the distance sensor 2, and the like, and 5 is a GPS (Global Positioning System) receiver. The GPS receiver 5 receives radio waves transmitted from a plurality of satellites and performs calculation. By doing so, the position (latitude, longitude) of the receiving point can be obtained. Reference numeral 6 denotes a CD-ROM drive, and this CD-ROM drive 6 reads map data from a CD-ROM 7 in which map data is recorded. Reference numeral 8 denotes a display / operation unit installed in the vehicle interior. The display / operation unit 8 is provided on a liquid crystal display 8A for displaying a map and the current traveling position, direction, etc. of the automobile, and is provided in front of the liquid crystal display 8A. The touch panel 8B includes a switch for instructing enlargement or reduction of the 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, and the apparatus main body 9 is installed in a trunk room or the like.

Next, the structure of the apparatus main body 9 will be described.
Reference numeral 10 denotes 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, 12 is data from the direction sensor 1, distance sensor 2, GPS receiver 5, CD-ROM drive 6 and the like, calculation results by the CPU 10, etc. Is a memory (DRAM) for storing data, 13 is a backup memory (SRAM) for holding necessary data even when power supply to the apparatus body 9 is stopped, and 14 is a character displayed on the liquid crystal display 8A. A memory (kanji, font ROM) in which patterns such as symbols are stored, 15 is an image processor for forming a display image based on map data, current position data of the vehicle, and 16 is a CPU 10
Map data, current position data and kanji output from
A memory (VRAM) for memorizing an image to be displayed on the liquid crystal display 8A by synthesizing Chinese characters such as a town name and a road name output from the font ROM 14 and a font, and 17 is a VRA
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 is a communication interface.

FIG. 10 shows a format of data stored in the CD-ROM 7, 20 is a disc label,
21 is drawing parameters, 22 is leaf management information, 23, 2
Reference numeral 4 is a map leaf, in which background data, character data, road data and the like are stored, and data for each unit map obtained by dividing a topographic map of Japan by latitude and longitude is stored. In the map leaf, a map leaf (level 2) that roughly describes a wide region to a map leaf (level 0) that describes a narrow region in detail are set. Each map leaf is composed of map display levels A, B, and C that describe the same area. Regarding the map display levels A, B, and C, B is described in more detail than A and C is described in more detail than B. In addition, each map display level A, B, C
Is composed of map display level management information and a plurality of units. The unit describes a divided area obtained by dividing the area of each map display level into a plurality of areas, and each unit includes a unit header, a character layer, a background layer, a road layer, an option layer, and the like.

A place name, a road name, a facility name, etc. displayed on a map are recorded in the character layer, data for drawing roads, facilities, etc. are recorded in the background layer, and the road layer is shown in FIG. As shown in FIG. 3, data regarding coordinate points (nodes) and lines (links) that describe roads including intersections, such as node numbers of nodes, latitude, longitude, link numbers of links, link distances, and the like are stored. Figure 11
In, circles (○) indicate nodes, and lines between nodes indicate links. A black circle (●) with a node number of 4 indicates an intersection node. In addition,
The data recorded in the road layer is not directly involved in the map display and is used as road network information for map matching.

In FIG. 8, the output of the azimuth sensor 1 and the output of the distance sensor 2 are sent 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. Based on the present position thus obtained, the map data of the unit corresponding to the present position is read from the CD-ROM 7 by the CD-ROM drive 6, and this 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,
It is converted into image data by the image processor 15 and written in the image memory 16. The image data stored in the image memory 16 is converted into a color signal by the RGB conversion circuit 17 and sent to the liquid crystal display 8A, and a map of a predetermined range centering on the current position is displayed. Further, if the map data read from the DRAM 12 includes character codes and symbol codes, patterns corresponding to these character codes and symbol codes are read from the kanji and font ROM 14, and the liquid crystal display 8A displays characters such as place names together with the map. , Symbols such as school are displayed. In addition, the current position displayed on the liquid crystal display 8A is sequentially changed based on the traveling speed and traveling direction that are sequentially obtained as the automobile travels. FIG. 9 shows a display example of the liquid crystal display 8A. Reference numeral 19 indicates the position of the own vehicle, and 20 indicates the traveling locus of the own vehicle.

[0007]

However, in the above conventional example, the traveling position display device (1) mounted on another vehicle is used.
However, there was a problem in that the location of other vehicles accompanying us could not be grasped due to waiting for traffic lights at intersections, traffic congestion, etc. Further, there are wireless devices and mobile phones as communication means, but these communication means cannot accurately transmit the position of the accompanying vehicle.

The present invention eliminates the above-mentioned drawbacks of the prior art. The position information of another vehicle can be displayed on the display device together with the position of the own vehicle, and various information can be displayed on the other vehicle by using the communication function. The present invention provides a traveling position display device that can be transmitted and displayed on a display device.

[0009]

The first invention of the present invention is as follows:
In order to achieve the above object, a vehicle position detecting means for detecting a vehicle position, a means for reading out map data corresponding to the vehicle position detected by the vehicle position detecting means from a storage means, and A means for displaying a map on the display means based on the map data and a means for displaying the own vehicle position detected by the own vehicle position detecting means, and transmitting at least the own vehicle position data detected by the own vehicle position detecting means. Or at least transmitting / receiving means for receiving other vehicle position data transmitted from another vehicle.

A second aspect of the present invention is characterized by including a transmitting / receiving means capable of transmitting / receiving message information in addition to vehicle position data.

A third aspect of the present invention is characterized by comprising message information selection means for selecting one from a plurality of message contents displayed on the display means.

A fourth aspect of the present invention comprises transmission selecting means for selecting individual transmission for transmitting message information to a predetermined specific vehicle and simultaneous transmission for transmitting message information to a plurality of vehicles. It is characterized by that.

A fifth aspect of the present invention is characterized by comprising a vehicle position detecting means for detecting the latitude and longitude of the vehicle based on a signal received by the GPS receiver.

[0014]

According to the first aspect of the present invention, not only the position of the own vehicle but also the position of another vehicle can be displayed on the display means.

According to the second aspect of the present invention, not only vehicle position data but also message information can be transmitted and received, and the message information can be displayed on the display means.

According to the third aspect of the present invention, the message content to be transmitted can be selected from a plurality of message content displayed on the display means.

According to the fourth aspect of the present invention, the message can be transmitted only to a specific vehicle or can be transmitted simultaneously to a plurality of vehicles.

According to the fifth aspect of the present invention, since the latitude and longitude of the own vehicle position are detected based on the signal received by the GPS receiver, the own vehicle position and other vehicle position data are accurate, and the own vehicle position, The other vehicle position can be accurately displayed on the display means.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
It will be explained together. FIG. 1 shows a traveling position display device according to an embodiment of the present invention. In FIG. 1, the same parts as those in the conventional example shown in FIG. In FIG. 1, 21 is a transceiver and 22 is an antenna.

FIG. 2 shows the operation of receiving and displaying vehicle position information transmitted from another vehicle. In FIG. 2, it is determined in step a whether or not other vehicle position information is displayed. This determination is made by operating another vehicle switch on the touch panel 8B in FIG. If no other vehicle switch is operated, the process proceeds to step e, where the operation of the normal traveling position display device is performed and the map and the vehicle position are displayed on the liquid crystal display 8A. Step a
If it is determined that the other vehicle switch is operated, the process proceeds to step b and the reception state is set. When the transceiver 21 of FIG. 1 completes the reception of vehicle position information from another vehicle, in step c, the vehicle position information (vehicle identification data, latitude data, longitude data) of the other vehicle is stored in the internal storage area. .

Next, in step d, the vehicle position information (vehicle identification data, latitude data, longitude) of the other vehicle stored in step c is displayed on the liquid crystal display 8A on which the vehicle position of the own vehicle and the current driving map are already displayed. Data) is read out, the vehicle position is calculated from the latitude and longitude data, the vehicle identification data is marked, and the data is displayed over the already displayed screen. When the display is completed, by repeating the processing from step b, other vehicle position information of the accompanying person and the already recognized movement status of the vehicle can be grasped in real time. FIG. 4 schematically shows an internal storage area of other vehicle position information stored by the iterative process. FIG. 3 shows a display example in which other vehicle positions are also displayed on the liquid crystal display 8A. In FIG.
19 is the position of the own vehicle, 23 is the position of the first other vehicle, and 24 is the position of the second other vehicle.

FIG. 5 shows the processing of another embodiment of the present invention. The present embodiment is an example of transmitting various information from the own vehicle to another vehicle. In FIG. 5, in step a, it is determined whether or not to transmit to another vehicle. This determination is made by operating the transmission switch of the touch panel 8B of FIG. When the transmission switch is not operated, the operation proceeds to step o and the usual traveling position display is performed. When it is determined that the transmission switch has been operated, in step b, the transmission menu screen (FIG. 6) is displayed on the liquid crystal display 8A.
Is displayed. A selection switch for individual transmission or simultaneous transmission is displayed on the menu screen. When individual transmission is selected in step c, another predetermined vehicle identification code is selected from the numerical code display on the menu screen in step d, and the selected numerical code display portion is touched and input. . When the transmission method is confirmed, next step g
At, the information transmission menu screen is displayed. When the message switch is selected in step h, the message content previously stored in the ROM is displayed in step i. When the selection of the information to be transmitted is completed in step j, the vehicle identification data and the selected message information data in steps k and l are transmitted in step n via the transceiver 21 of FIG. When it is desired to transmit the vehicle position information of the own vehicle in the same procedure, the latitude data and the longitude data are transmitted in step m instead of the message data. When transmitting to all accompanying vehicles, after selecting the simultaneous transmission in step c, the vehicle identification data is transmitted in step f with a predetermined simultaneous code (for example, "FF").

FIG. 6 shows a message selection menu displayed on the liquid crystal display 8A. By operating the upper selection key 25 and the lower selection key 26, the message content to be transmitted is selected.

FIG. 7 shows a display example in which the message information transmitted from the leading vehicle M is received by the vehicle 19 and displayed on the liquid crystal display 8A. The position of the leading vehicle is displayed on the liquid crystal display 8A of the own vehicle, and the message "Stop at the next gas station" is displayed, indicating that the leading vehicle is about to stop at the gas station 27 on the display screen. Can be grasped at.

[0025]

The present invention has the above-described structure. According to the present invention, not only the position of the own vehicle but also the position of another vehicle can be displayed on the display means of the own vehicle. Therefore, when driving with a plurality of vehicles, the mutual positional relationship of the vehicles can be easily grasped. Further, according to the present invention, not only the position data of the vehicle but also the message content can be transmitted to another vehicle, which has an advantage that communication can be achieved between the vehicles. Further, since the message content can be selected from a plurality of messages, there is an advantage that necessary messages can be transmitted easily and quickly.

Further, according to the present invention, there is an advantage that the message can be transmitted only to a specific vehicle or the same message can be transmitted to a plurality of vehicles.

Further, according to the present invention, the position of the own vehicle is detected based on the signal received by the GPS receiver, so that the position of the own vehicle and the position of the other vehicle can be accurately detected, and the position of the own vehicle and the position of the other vehicle are displayed on the display means. It has an advantage that can be accurately displayed.

[Brief description of 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 flowchart showing an operation in the same embodiment.

FIG. 3 is a display diagram of a liquid crystal display in the embodiment.

FIG. 4 is a configuration diagram of other vehicle data stored in a storage device in the embodiment.

FIG. 5 is a flowchart showing the operation of the traveling position display device in another embodiment of the present invention.

FIG. 6 is a display diagram showing a message information menu in the embodiment.

FIG. 7 is a display diagram of a liquid crystal display in the example.

FIG. 8 is a block diagram of a conventional traveling position display device.

FIG. 9 is a display diagram of a liquid crystal display in the conventional example.

FIG. 10 is a block diagram showing the format of a conventional CD-ROM.

FIG. 11 is a configuration diagram showing road data recorded in a CD-ROM of the conventional example.

[Explanation 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 Main Body 10 CPU 15 Image Processor

Claims (5)

[Claims] 1. A vehicle position detecting means for detecting a vehicle position, a means for reading map data corresponding to the vehicle position detected by the vehicle position detecting means from a storage means, and the read map data. Means for displaying the map on the display means based on the display means and the vehicle position detected by the vehicle position detection means, and transmitting at least the vehicle position data detected by the vehicle position detection means, or A traveling position display device comprising at least a transmitting / receiving means for receiving other vehicle position data transmitted from another vehicle, and displaying the own vehicle position and the other vehicle position on the display means. 2. The traveling position display device according to claim 1, further comprising a transmitting / receiving means for transmitting / receiving vehicle position data and message information. 3. The traveling position display device according to claim 2, further comprising message information selection means for selecting one from a plurality of message contents displayed on the display means. 4. The traveling according to claim 2, further comprising transmission selection means for selecting individual transmission for transmitting message information to a predetermined specific vehicle and simultaneous transmission for transmitting message information to a plurality of vehicles. Position display device. 5. The traveling position display device according to claim 1, further comprising: own vehicle position detecting means for detecting the latitude and longitude of the own vehicle position based on the signal received by the GPS receiver.