JPH1062183A - On-vehicle navigation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable simply transmitting and resetting course information which is changed and set by a vehicle among a plurality of vehicles, to other vehicles, by transmitting changed contents with a radio apparatus, when set course information is changed. SOLUTION: A radio apparatus 3 has a radio apparatus unit 31, a modulation/demodulation circuit 32 and a radio antenna 33, and transmits position information and course information as a radio signal. At the time of receiving, received data are sent to a navigation unit 12 via the radio apparatus 3 and a GPS data communication modem part 2. All vehicles have the same constitution, and the antenna 33 receives a radio wave signal form other vehicle. When set course information is changed, the changed contents are transmitted as the radio wave signal, via the radio apparatus 3. Thereby navigation data which are set in one vehicle can be automatically transmitted to navigation systems of the other vehicles, so that operability and convenience are improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an in-vehicle navigation system, and more particularly to an in-vehicle navigation system having a function of transmitting and receiving course information between 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 are traveling in a group, it is desired to display position information of other vehicles together on the display, such as when it is desired to mutually confirm the positions of the vehicles or when the vehicle has separated. Japanese Patent Laid-Open No. 4-70999 discloses a wireless navigation system capable of obtaining position information not only of own position information but also of a predetermined specific vehicle. This system has a transmission function that one vehicle obtains its own position information based on a GPS signal for position identification received from a GPS satellite, and transmits the obtained position information as a radio signal. Receives the radio signal and displays the position information of the one vehicle on a display.

[0004]

However, in the on-vehicle navigation system as described above, the information transmitted to other vehicles is limited to the position information obtained by the GPS system, and the operation thereof has the following problems. is there.

For example, when a plurality of vehicles travel in a group and head for the same destination, the course may be changed on the way, and sometimes the destination may be changed. In such a case, conventionally, the change information is transmitted from a specific vehicle using a wireless device, a mobile phone, or the like, and the vehicle that receives the information changes the navigation system based on the received information. The information has been reset. Such a state is a case where it is desired to transmit a detour course provided based on traffic congestion information to another vehicle in a navigation system equipped with a VICS system that has been put into practical use. In particular, when there are a plurality of detour courses given based on traffic congestion information, even if other vehicles are equipped with the same system, it is not possible to know which one of them was selected, The transmission of the set course information is indispensable.

Therefore, in the conventional on-vehicle navigation system, in order for a plurality of vehicles constituting one group to share the same navigation information, all vehicles other than the master vehicle for setting the basic navigation information receive radio signals. Information must be set one by one by key input, which is not only complicated but also causes a problem of incorrect setting.

Accordingly, an object of the present invention is to provide a vehicle-mounted navigation system in which course information changed and set in one vehicle can be easily transmitted and reset between a plurality of vehicles each equipped with a navigation system to another vehicle. It is to provide a system.

[0008]

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. In a vehicle-mounted navigation system that displays a car position together with map information and also displays course information to a set destination, when there is a change in the set course information, the content of the change is transmitted to a wireless device. Transmitted in the form of a radio signal via

A vehicle-mounted navigation system according to another aspect of the present invention obtains the position of the own vehicle based on a GPS signal from a GPS satellite or a mounted sensor signal, and calculates the obtained position of the own vehicle together with map information. Display,
In a vehicle-mounted navigation system that also displays course information to a set destination, a VICS system is mounted, and when the course information is changed based on the obtained VICS information, the contents of the change are transmitted via a radio to a radio. Transmit in the form of a signal.

Here, on the other vehicle side receiving the radio signal, the course information corresponding to the change is reset, and the course information is changed by a manual operation. Is automatically performed based on the VICS information.

[0011]

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 according to the procedure described below.

[0012] A GPS radio signal from a GPS satellite is a GP signal.
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.

[0013] 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).

The 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.

When a plurality of vehicles are displayed on the screen of the display device 14 by the above processing, the scale of the display screen can be automatically changed so that all necessary vehicle positions are displayed. it can.

In this embodiment, the communication data format transmitted from the antenna 33 of the wireless device 3 includes a point, course data (starting point), course data (middle),
Four types of determination statuses of course data (destination) are included, and normal position data is data having a special meaning. The vehicle that has received the communication data format determines the status and automatically registers the status as the vehicle course data.

FIG. 2 is a flowchart showing the course information transmission processing procedure in this embodiment. First, VIC
The VICS information received by the S receiving antennas 11B to 11D is analyzed (step S1), and there is traffic congestion information, and it is determined whether or not there is automatic change to the detour course (step S2). If there is no change, the process determines in step S3 whether or not the user has changed the course based on the VICS information.
Here, if there is no change, the process is terminated. If there is a change, in step S4, a course is searched to update the course data, and transmission data to another station corresponding to another vehicle is generated (step S4). S5). Since the starting point of the transmission data is known, course information on the way is mainly used. Subsequently, it is determined whether or not transmission is possible, such as a vacant state of the wireless line (step S6). If transmission is not possible, the process is terminated. The course information including the data is transmitted (step S7).
Next, it is determined whether or not the transmission has been completed (step S
8) If the processing has been completed, the processing is completed; if not, the processing returns to step S6.

FIG. 3 shows a flowchart of the course data reception processing procedure in another vehicle. First, transmission data including course data from another station is received (step S1).
1) It is determined whether or not the reception has been performed normally by determining the validity of the checksum (step S12). If the reception has not been performed normally, the process returns to step S11, and if it is determined that the reception has been performed normally. Determines whether the data is the starting point (step S13), and if it is the starting point data, stores it in the memory as the starting point data (step S13).
14), end the process. If it is determined in step S3 that the data is not the starting point data,

In step S15, it is determined whether or not the data is intermediate course data (step S15). If it is determined that there is intermediate course data, the data is stored in the memory as intermediate course data (step S16). Then, it is determined whether or not the destination data is present (step S1).
7). If the answer is NO, the process is terminated. If the answer is NO, the destination data is stored in the memory (step S18), and the points of the course from the starting point to the destination are recognized as the course data. (Step S19),
The course data is set for the current course, displayed on the navigation screen (step S20), and the process ends.

In the above embodiment, the data format for the ordinary position data communication is used. However, the operation mode dedicated to the internal setting of the navigation and the data setting for the setting are used to create the internal setting of the navigation. Multiple systems can be transferred.

In the navigation corresponding to the VICS information, if the VICS information has an automatic course setting correction function,
The corrected course information can be automatically transmitted to another vehicle.

[0027]

As described above, according to the on-vehicle navigation system of the present invention, the navigation data set for one vehicle can be automatically transmitted to the navigation system of another vehicle. Convenience is greatly 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 a transmission operation of the embodiment shown in FIG. 1;

FIG. 3 is a flowchart for explaining a receiving 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 21 GPS data communication Modem unit 22, 32 Modulation / demodulation circuit 31 Radio unit 33 Radio antenna

Claims (5)

[Claims] 1. A self-vehicle position is obtained based on a GPS signal from a GPS satellite or an on-board sensor signal, the obtained self-vehicle position is displayed together with map information, and a course to a set destination is obtained. An in-vehicle navigation system that also displays information, wherein when the set course information is changed, the change is transmitted in the form of a radio signal via a wireless device. 2. A course for obtaining a vehicle position based on a GPS signal from a GPS satellite or an on-board sensor signal, displaying the obtained vehicle position together with map information, and reaching a set destination. In a vehicle navigation system that also displays information, a VICS system is mounted, and when course information is changed based on the obtained VICS information, the contents of the change are transmitted in the form of a radio signal via a wireless device. Features a car navigation system. 3. On the other vehicle side receiving the radio signal,
The in-vehicle navigation system according to claim 1 or 2, wherein course information corresponding to the changed content is reset. 4. The in-vehicle navigation system according to claim 1, wherein the course information is changed by a manual operation. 5. The in-vehicle navigation system according to claim 1, wherein the change of the course information is automatically performed based on VICS information.