JPH0843517A - Vehicle-mounted navigation system - Google Patents

Abstract

PURPOSE:To provide a vehicle-mounted navigation system by which not only the present position of driver's own vehicle but also the present position of another vehicle can be recognized. CONSTITUTION:The vehicle-mounted navigation system is provided with an own-vehicle-position recognition part 1 which recognizes an absolute position (a present position) where driver's own vehicle is running at present, a map data storage part 2 which has stored map data, a transmission part 3 by which present-position information recognized and obtained by the own-vehicle-position recognition part 1 is transmitted to the outside, a reception part 4 which receives information given from the outside, a display part 5 which is arranged near a driver's seat, and a control part 6 which controls the whole system. On the basis of the present-position information on the own vehicle, a map in a definite region including the present position is displayed on the screen of the display part 6. At the same time, the present position of another vehicle is displayed together with the present position of the own vehicle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an on-vehicle navigation system, and more particularly to displaying a map of a certain area including the current position on a display while recognizing the current position of the own vehicle and displaying the current position of the own vehicle on the map. The present invention relates to an in-vehicle navigation system that provides a vehicle guidance service to a driver.

[0002]

2. Description of the Related Art Conventionally, in this type of vehicle-mounted navigation system, the current location of the vehicle the user is driving is
It was recognized by identifying from the direction of the geostationary satellite or by communicating with a transceiver installed on a specific road. Then, by displaying a map of a certain area including the recognized current position on the display arranged near the driver's seat and displaying the current position on the map, the driver can be provided with the position information of the current position where the vehicle is traveling. I was trying to give.

[0003]

However, in the above-described conventional vehicle-mounted navigation system, only the present location of the vehicle is displayed on the map,
For example, when an emergency vehicle such as a fire engine or a patrol car is traveling toward the same destination for several vehicles, it is not possible to recognize the current location of another vehicle only from the map and the current location information of the vehicle itself. . Therefore, at an intersection with poor visibility, an accident between emergency vehicles may occur.

The present invention has been made in view of the above problems, and an object of the present invention is to provide an in-vehicle navigation system capable of recognizing not only the present location of the own vehicle but also the present location of another vehicle. To aim.

[0005]

A vehicle-mounted navigation system according to the present invention comprises a display means arranged near the driver's seat, a storage means for storing map data, and a vehicle position recognition means for recognizing the current position of the vehicle. Receiving means for receiving specific position information indicating a specific position given from the outside, transmitting means for transmitting the current position information indicating the current position of the own vehicle recognized by the own vehicle position recognizing means to the outside, and own vehicle position recognition The map data of a map of a certain area including the current location recognized by the means is read from the storage means, the map is displayed on the display means, and the map is received by the receiving means together with the current location of the vehicle based on the current location information. And a control means for controlling to display a specific position based on the specific position information.

[0006]

In the in-vehicle navigation system having the above structure, the vehicle recognizes the current location of the vehicle and transmits the current location information to the outside, while displaying a map of a certain area including the current location on the screen of the display means. indicate. Then, along with the current position of the own vehicle, a specific position based on the specific position information received from the outside, for example, the current position of another vehicle is displayed on the map. As a result, the driver can be made to recognize not only the present location of the own vehicle but also the present location of another vehicle.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. The vehicle-mounted navigation system according to the present embodiment includes a vehicle position recognizing unit 1 that recognizes an absolute position (current position) of a vehicle currently traveling, a map data storage unit 2 that stores map data, and a vehicle position recognizing unit. 1, a transmitter 3 for transmitting the current location information obtained and recognized, a receiver 4 for receiving information provided from the outside, a display 5 such as a CRT display arranged near the driver's seat, and a system The basic configuration is a control unit 6 including a microcomputer that controls the entire system.

The vehicle position recognizing unit 1 uses a position beacon used in a road-to-vehicle information system and a GPS (G) which measures the position of a vehicle from the arrival time difference of radio waves emitted from a geostationary satellite.
The current location of the vehicle is recognized using a well-known method such as the lobal positioning system). In addition, in order to recognize the vehicle position, not only a method of inputting the vehicle position information described above from the outside, but also a sensor for detecting the traveling distance of the vehicle,
It is also possible to use a method of measuring the own vehicle position based on each output from the direction sensor that detects the traveling direction.

The map data storage unit 2 includes, for example, a CD-ROM as a storage medium for map data and this CD-RO.
It is composed of a CD-ROM driver for reading map data from M. The map data stored in advance in the CD-ROM is composed of road data, place name data, administrative division boundary data, river data, facility data, and the like. The storage medium for map data is CD-
The storage medium is not limited to the ROM, and other storage medium such as an IC card can be used.

The transmitting unit 3 transmits the current position information recognized by the vehicle position recognizing unit 1 to another vehicle at a predetermined interval as radio waves of constant power using a specific frequency band. On the other hand, the receiving unit 4 receives radio waves having a certain strength or more,
According to the same principle as the transmitting unit 3 of the own vehicle, the current location information of the other vehicle transmitted from the other vehicle is obtained. The current location information of other vehicles is
It is sent to the control unit 6. As the frequency band of the radio wave used for transmitting the current location information, a different band is set for each user group (group) such as police related and fire related.

Based on the current location information of the vehicle from the vehicle position recognition section 1, the control section 6 reads out map data of a map of a certain area including the current location from the map data storage section 2 and displays the screen of the display section 5. The map is displayed on the map, the own vehicle mark is displayed on the map based on the current position information of the own vehicle, and the other vehicle mark is displayed based on the current position information of the other vehicle received by the receiving unit 4. Control to display. The control unit 6 further calculates the distance between the two vehicles from the current position information of the own vehicle and the current position information of the other vehicle, and drives the alarm unit 7 such as an alarm when the distance becomes less than a certain distance. Control to generate an alarm.

Next, a case where the on-vehicle navigation system having the above-mentioned configuration is installed in, for example, a fire engine will be described. Note that FIG. 2 shows a positional relationship between the own vehicle and another vehicle in the vicinity of a certain intersection. In the figure, A is the own vehicle mark, B is the other vehicle mark, and C is the site (destination) where the fire occurred.

The own vehicle position recognizing unit 1 recognizes the current position of the own vehicle as the vehicle moves, and sequentially sends the recognized current position information of the own vehicle to the control unit 6. The control unit 6 sends the current location information to the other vehicle through the transmission unit 3, while designating a map of a certain area including the current location based on the current location information, and stores the map data in the map data storage unit 2 It is read out from the vehicle and displayed on the display unit 5, and a vehicle mark A indicating the current location of the vehicle is displayed on the map based on the current location information.

When the other vehicle traveling toward the same destination C becomes closer to the own vehicle and the intensity of the radio wave including the current location information of the other vehicle transmitted from the other vehicle becomes a certain intensity or more, The reception section 4 receives the radio wave and sends the current location information of another vehicle to the control section 6. Then, the control unit 6 causes the other vehicle mark B indicating the current location of the other vehicle to be displayed on the map on which the own vehicle mark A is displayed, based on the current location information of the other vehicle.

That is, on the map, along with the own vehicle mark A, a certain distance d relative to the own vehicle is determined by the strength of the radio wave of another vehicle.
The other vehicle mark B will also be displayed at the same time when it is approached by o. As a result, for example, when the site where the fire has occurred is the same destination C and several fire engines are running toward the destination C, the driver can change the position of another vehicle at an intersection with poor visibility. Even if is not directly confirmed, the other vehicle can be confirmed in advance on the screen of the display unit 5, so an accident can be prevented in advance.

When the other vehicle mark B is displayed, for example, by blinking the other vehicle mark B, the driver can be more surely aware of the approach of the other vehicle. Further, the control unit 6 constantly monitors the distance between the own vehicle and another vehicle, and drives the alarm unit 7 to issue an alarm when the distance becomes a certain distance do or less. Therefore, the driver can know that he / she is extremely close to the other vehicle without frequently looking at the screen of the display unit 5, so that driving safety can be secured.

In the above embodiment, the current position of the other vehicle is recognized as the current position of the other vehicle within a certain distance do with respect to the own vehicle. I explained about the case like this,
For example, it is possible to set the disaster prevention equipment such as a fire stopper as a specific position and transmit the position information from the specific position when a fire occurs. According to this, the fire engine side can recognize the current location of the vehicle with respect to the disaster prevention facility, which is the destination, in real time when going to the disaster prevention facility. Furthermore, by similarly arranging the navigation system on the disaster prevention facility side, the position of the fire engine can be recognized from the disaster prevention facility side.

[0019]

As described in detail above, according to the present invention, in the vehicle-mounted navigation system having the above-described structure, the vehicle recognizes the current location of the vehicle and transmits the current location information to the outside. , A map of a certain area including the current location is displayed on the screen of the display means, and the specific location, for example, the current location of another vehicle is displayed on the map based on the specific location information received from outside together with the current location of the own vehicle. As a result, the driver can be made to recognize not only the current location of the vehicle but also the current locations of other vehicles.

[Brief description of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a diagram for explaining the operation of the present invention.

[Explanation of symbols]

1 vehicle position recognition unit 2 map data storage unit 3 transmission unit 4 reception unit 5 display unit 6 control unit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location // H04Q 7/34

Claims (4)

[Claims] 1. A display means arranged near the driver's seat, a storage means for storing map data, a vehicle position recognition means for recognizing the current position of the vehicle, and a specific position indicating a specific position given from the outside. Receiving means for receiving information, transmitting means for transmitting the current location information indicating the current location of the vehicle recognized by the vehicle location recognizing means to the outside, and a certain area including the current location recognized by the vehicle location recognizing means Based on the specific position information received by the receiving means together with the current location of the vehicle based on the current location information on the map by reading the map data of the map from the storage means and displaying the map on the display means. An in-vehicle navigation system comprising: a control unit that controls to display a specific position. 2. The in-vehicle navigation system according to claim 1, wherein the specific position is a current position of another vehicle within a certain distance from the own vehicle. 3. The separation distance between the own vehicle and another vehicle is calculated based on the specific position information received by the receiving means and the current position information of the own vehicle, and the separation distance becomes equal to or less than a certain distance. The vehicle-mounted navigation system according to claim 2, further comprising means for issuing an alarm at times. 4. The in-vehicle navigation system according to claim 1, wherein the specific position is a fixed position, and the specific position information is issued only in a certain state at the fixed position.