JPH1062192A - On-vehicle navigation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an on-vehicle navigation system by which a communication operation can be performed easily between a plurality of vehicles which constitute, and belong to, a group by a method wherein a navigation system and a radio system are carried. SOLUTION: In a system, the position of an own vehicle is found on the basis of a GPS signal from a GPS satellite or on the basis of a signal from a carried sensor, the found position of the own vehicle is displayed together with map information, also information of a course reaching a set destination is displayed, and the information is transferred by a transmitting and receiving operation via a radio apparatus. Then, a group code is allocated to radio apparatuses which are carried on a plurality of predetermined vehicles, a group code is added in a transmitting and receiving operation, and information on a station at a radio apparatus on a communication partner vehicle in which a received group code agrees with a group code belonging to the vehicle is displayed.

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 an on-vehicle navigation system having a function of grouping on-vehicle radios among a plurality of vehicles equipped with a navigation system.

[0002]

2. Description of the Related Art In-vehicle navigation, which is mounted on a vehicle to inform a driver of course information to a destination or the like, has been widely used in recent years. This kind of in-vehicle navigation system uses a GP that attaches a radio signal from a GPS satellite to a vehicle.
The position of the own vehicle is received based on the received signal with the S antenna, and the obtained position of the own vehicle is displayed on a display such as a liquid crystal together with the map information transmitted from the map database. Further, the actual road position and the map road position are matched by performing a map matching process. The position of the host vehicle can be obtained with higher accuracy by referring to sensor outputs obtained from an acceleration sensor such as a gyro sensor and a vehicle speed sensor installed in the vehicle. Such a system is called hybrid navigation.

By the way, when a plurality of vehicles travel in a group, in order to respond to a demand for mutually transmitting and receiving various information by wireless communication, a station code assigned to each wireless station is added and transmitted. I do. The received station code from the vehicle wireless station is identified and displayed on the display unit.

[0004]

However, in the above-described in-vehicle navigation system, the station code of the radio station mounted on each vehicle is identified from the received information, and the identified station information is displayed. Therefore, all the received radio station information is always displayed. Therefore, when a group is composed of a plurality of vehicles, all the radio stations including the radio stations of the vehicles belonging to the group are displayed even though the communication is mainly performed only by the radio stations belonging to the group. ,
The user must search for the wireless station of the vehicle from which communication is desired, and there is a problem in operability.

Accordingly, an object of the present invention is to provide an in-vehicle navigation system in which a navigation system and a radio station are mounted, and a plurality of vehicles constituting a group can easily communicate with each other in the group. It is in.

[0006]

In order to solve the above-mentioned problems, an on-vehicle navigation system according to the present invention obtains a position of a vehicle based on a GPS signal from a GPS satellite or a mounted sensor signal, and obtains the determined vehicle position. The car position is displayed together with the map information, the course information to the set destination is also displayed, and the information is transmitted and received via a wireless device. A group code is assigned to the mounted radio, the group code is added at the time of transmission and reception, and a group code function for displaying station information of a radio of a communication partner vehicle in which the received group code matches the group code to which the radio belongs is provided. Have.

Here, the group code function operation is defined as O
A means for setting N / OFF is provided, and when the group code function operation is OFF, the received station information of the wireless device of the desired vehicle of the communication partner is displayed. Further, at least one station information is selected from the displayed station information, information is transmitted to the selected station, and a screen display is controlled so as to display the station information.

[0008]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing one embodiment of a vehicle-mounted navigation system according to the present invention.
In the present embodiment, the navigation unit 1 shown in FIG.
A system including the S communication modem unit 2 and the wireless unit 3 is mounted on a vehicle as a mobile body, and calculates the own vehicle position and transmits and receives the obtained own vehicle position information.

[0009] GPS radio signals from GPS satellites are
The signal is received by the S antenna 11A and transmitted to the navigation unit 12 constituting the GPS system. The navigation unit 12 obtains own vehicle position information such as latitude and longitude information of the own vehicle based on the received GPS signal and a sensor output signal obtained from an autonomous navigation sensor 13 such as an acceleration sensor or a vehicle speed sensor.

[0010] The navigation unit 12 also includes a CD.
-Reading map information of a necessary area from map information stored in a storage medium 15 such as a ROM, and combining the own vehicle position information obtained by the navigation unit 12 and the map information from the storage medium 15 (map matching) Processing)
It is displayed on the screen of the display device 14.

The user interface 16 is an operation unit for instructing the operation of the present system, and includes keys and push buttons, and is, for example, a remote controller or a touch panel.

The navigation unit 12 further includes an F
M multiplex antenna 11B, radio beacon receiving antenna 11
C or VICS by optical beacon receiving antenna 11D
The information is received, and a detour course or the like is searched based on the received VICS information.

The GPS data communication modem unit 2 transmits the vehicle position information and the course information obtained by the navigation unit 12 in the form of a radio signal via the wireless device 31 of the wireless unit 3 and the wireless antenna 33, and transmits other information. Transmit own vehicle position information to the vehicle. The GPS data communication modem unit 2
PS data communication modem unit 21 and modulation / demodulation circuit 22
From the navigation unit 12 to the serial I
The information transmitted via / F is transmitted to the wireless unit 3.

The radio unit 3 includes a radio unit 31 and a
It has a demodulation circuit 32 and a radio antenna 33, and transmits position information and course information in the form of a radio signal. In the configuration of FIG. 1, at the time of reception, the reception data is transmitted to the navigation unit 12 via the radio
Sent to The modulation / demodulation circuits 22 and 32 are connected by a packet communication line (audio data).

Other vehicles have the same configuration as that of FIG. 1, and the operation at the time of reception is as follows. The wireless antenna 33 receives a radio signal transmitted from a wireless antenna of a system of another vehicle. The radio unit 31 processes a position information signal and a navigation information signal of the other vehicle received from the other vehicle by the wireless antenna 33, and transmits the processed signal to the navigation unit 12 via the GPS communication modem unit 2.

As described above, the navigation unit 12 displays the position information of the other vehicle obtained along with the position information of the own vehicle on the display device 14 so as to be superimposed on the map information. The changed course information is obtained based on the course information such as the above, and displayed on the display device 14.
When there are a plurality of other vehicles, a specific color or mark is assigned to each vehicle and displayed, thereby facilitating identification between the vehicles. Further, when the vehicle is not running and is stopped, the display of the stopped vehicle may be displayed in another special display form, for example, blinking.

In the present embodiment, a group code indicating the group is assigned to the radios of a plurality of vehicles constituting a group, and the communication data format transmitted from the antenna 33 of the radio 3 of one vehicle is set. To the group code. The group determining unit 17 of the vehicle that has received the communication data format determines whether the group code included in the received communication data format matches the group code to which the vehicle belongs.
When they match, the radio station information of the receiving vehicle is displayed on the display unit 14 via the operation of the navigation unit 12 and stored in the memory 18. All the station information included in the group code stored in the memory 18 is displayed. Instead of using the group code function as described above, all the receiving station information can be displayed unconditionally.

The setting of the group code function can be performed by key input from the user interface 16, or the display unit 14 can be a display unit with a touch panel function, and can be input and set by the touch panel function. Further, ON / OF of the above group code function
F setting is also possible. That is, when the group code function is ON, only the station information having the same group code is displayed, and when the group code function is OFF, the desired communication partner station information is unconditionally displayed. Further, it is also possible to select at least one station from the displayed wireless stations and perform communication.

When a plurality of vehicles and station information are displayed on the screen of the display device 14 by the processing described above, the scale of the display screen is automatically changed so that all necessary vehicle positions are displayed. Can be done.

FIG. 2 shows a flowchart of the operation processing procedure of the present embodiment. FIG. 2 illustrates an example in which a display unit with a touch panel function having an input function is used as the display unit 14. In FIG. 2, first, a main screen (menu setting screen) of the navigation system is displayed (step S1), and "own station setting" is selected from this screen to perform a own station setting operation (step S2). Is determined correctly (step S3). If the setting is not correct, the process returns to step S1. If the setting is correct, the group code is input (step S4), and it is determined whether or not the input is correctly performed (step S4). S5). If the group code has not been correctly input, the process returns to step S2. If the group code has been correctly input, the code is input (step S6), and a signal from the partner station is received (step S7). Subsequently, ON / OFF setting of the group code function is performed (step S8), and it is determined whether the setting is ON (step S9). In step S9,
If not, the station information of the communication partner is stored and displayed in the memory 18 (step S11), and the process ends. On the other hand, if it is ON in step S9, it is determined whether or not the group codes match (step S10). If they do not match, the process ends. If they match, the process proceeds to step S11. .

In the above embodiment, when a group code is input and transmitted from the group code input screen, the code is also transmitted as a part of the navigation data. Is displayed. Conversely, the group code of the other party can also be displayed on the screen of the own station. In this way, it is possible to know who the communication partner is and to smoothly communicate with the communication partner. Also, since the group code is registered, a desired communication partner can be selected and communication can be performed.

[0022]

As described above, according to the on-vehicle navigation system of the present invention, only the radio station information of vehicles belonging to the same group code can be displayed by setting the group code function. Also, desired receiving station information can be displayed. At this time, a desired station can be selected from the displayed station information to perform communication, and operability is significantly improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a vehicle-mounted navigation system according to the present invention.

FIG. 2 is a flowchart for explaining the operation of the embodiment shown in FIG. 1;

[Explanation of symbols]

 Reference Signs List 1 navigation unit 2 GPS communication modem unit 3 radio unit 11A GPS antenna 11B FM multiplex antenna 11C radio beacon reception antenna 11D optical beacon reception antenna 12 navigation unit 12 13 autonomous navigation sensor 14 display device 15 storage medium 16 user interface 17 group judgment unit 18 Memory 21 GPS data communication modem unit 22, 32 Modulation / demodulation circuit 31 Radio unit 33 Radio antenna

Claims (5)

[Claims] 1. A vehicle position is determined based on a GPS signal from a GPS satellite or a mounted sensor signal, the determined vehicle position is displayed together with map information, and course information to reach a set destination is provided. In an in-vehicle navigation system that transmits and receives information through transmission and reception via a radio, a group code is assigned to radios mounted on a plurality of predetermined vehicles, and the group code is added at the time of transmission and reception. An on-vehicle navigation system having a group code function for displaying station information of a wireless device of a communication partner vehicle whose received group code matches the group code to which the vehicle belongs. 2. The method according to claim 1, wherein said group code function operation is ON / OF.
2. The on-vehicle navigation system according to claim 1, further comprising means for setting F. 3. The in-vehicle navigation system according to claim 2, wherein when the group code function operation is turned off, the received station information of the wireless device of the desired vehicle of the communication partner is displayed. 4. The in-vehicle navigation system according to claim 1, wherein at least one station information is selected from the displayed station information, and the information is transmitted to the selected station. 5. The in-vehicle navigation system according to claim 1, wherein a screen display is controlled so as to display the station information.