JPH1038590A - Traffic information display device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To select traffic information which is advantageous in information volume (detailedness of information) and obtain a proper traffic information corresponding to the travel state of driver's own vehicle, and also select information which is advantageous in freshness of information and obtain the latest traffic information at all times when receiving traffic information broadcasted by a plurality of media such as an FM multiplex broadcast, a radio wave beacon, and an optical beacon. SOLUTION: The vehicle traffic information display device 4 which receives traffic information broadcasted by the broadcast media and displays the contents of the traffic information discriminates a road kind as an object provided by the traffic information received by receivers 1-3 for the respective broadcasts and selects a broadcast medium on the basis of the discriminated road kind. Further, the broadcast medium is selected according to differences in the receiving time of the traffic information among the receivers.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traffic information display device for a vehicle which receives traffic information broadcasted from broadcasting equipment on a vehicle side and displays the received traffic information.

[0002]

2. Description of the Related Art Recently, as part of a service for providing traffic information, VICS (Vehicle Information) has been developed.
on and Communication System
em) is started, and traffic information regarding traffic congestion on the road is transmitted by radio beacons, optical beacons, F beacons.
The system receives traffic information broadcast via each broadcast medium by M multiplex broadcasting and is broadcast by a receiver mounted on a vehicle when the vehicle is running, and displays the content of the received traffic information on a screen or the like of a vehicle navigation device. Is being developed.

[0003] The traffic information by VICS is VICS.
The information is edited every moment at the center, updated periodically, and broadcast together with the data of the provided time from each broadcast medium.

[0004] The traffic information by the VICS is
Since the broadcasting areas of the radio beacon, the optical beacon, and the FM multiplex broadcasting are different, traffic information corresponding to each broadcasting medium is separately edited.

[0005] In addition, the traffic information based on the VICS is based on the characteristics of the wide and narrow coverage area of each broadcast medium and the problem of installation of broadcast facilities on the road. The degree of detail of the traffic information, that is, the amount of information is different for each road type of road and expressway.

Conventionally, radio beacons, optical beacons, F
A dedicated receiver is installed for each of the M multiplex broadcasts, and when traffic information is received from a plurality of broadcast media, the traffic information with the latest provision time is selected.

[0007]

The problem to be solved is that, for each broadcast medium such as a radio beacon, an optical beacon, and FM multiplex broadcasting, the time required to edit traffic information and the traffic information to be transmitted to each broadcasting facility. The time required to transmit the traffic information differs, and the provision time of the traffic information obtained by each broadcasting medium does not match the freshness of the traffic information, and the traffic information received from a plurality of broadcasting media is selected only by the provision time. Then, it is not always possible to obtain the latest traffic information.

[0008] Further, since the amount of traffic information differs for each broadcast medium and for each road type, it is not always necessary to select traffic information received from a plurality of broadcast media based only on the provided time. Information cannot be obtained.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a vehicle-mounted receiver receives traffic information broadcast by a plurality of types of broadcast media such as a radio beacon, an optical beacon, and FM multiplex broadcasting. In the vehicle traffic information display device for displaying information, in order to be able to obtain appropriate traffic information according to the road type, receive the traffic information for each broadcast media, A means for identifying a road type to be provided and a means for selecting a broadcast medium based on the identified road type are used to display traffic information received by the selected broadcast medium.

The present invention is also directed to a vehicular traffic information display device for obtaining the latest traffic information from a plurality of types of broadcast media such as a radio beacon, an optical beacon, and FM multiplex broadcasting. Means for receiving the traffic information and the provision time thereof for each broadcast medium, and means for selecting the broadcast media based on the difference between the broadcast media in the provision time of the received traffic information. The traffic information received by the media is displayed.

Further, the present invention provides a traffic information display device for a vehicle, which obtains appropriate traffic information according to a road type from a plurality of types of broadcast media such as a radio beacon, an optical beacon, and FM multiplex broadcasting. Means for receiving the traffic information and its provision time for each broadcast media, and means for identifying the type of road to which the received traffic information is provided, so that the latest traffic information can be obtained; Means for determining the difference between the broadcast media of the provision times of the received traffic information, and means for selecting the broadcast media based on the difference between the identified road type and the calculated provision time are provided. Traffic information received by broadcast media is displayed.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a vehicular traffic information display device according to the present invention uses an FM multiplex broadcast receiver 1 for receiving traffic information broadcast by FM multiplex from a broadcast station, and a radio beacon from a road facility. The system includes a radio beacon receiver 2 for receiving broadcasted traffic information, an optical beacon receiver 3 for receiving traffic information broadcasted by optical beacons from road facilities, and a vehicle navigation device 4.

Here, the traffic information broadcast from each broadcasting medium by FM multiplex broadcasting, radio wave beacon, and optical beacon is the above-mentioned traffic information by VICS.

[0014] As shown in Table 1, the amount of traffic information is different depending on the type of road, that is, the general road and the expressway, according to each broadcasting medium.

[0015]

[Table 1]

Also, the time (time delay) required for collecting and providing traffic information at the center from the time at which the traffic information is collected by a sensor for detecting the running condition of the vehicle installed on the road is different. Therefore, as shown in Table 2, the time delay of providing the traffic information differs depending on the type of the general road and the expressway, as shown in Table 2.

[0017]

[Table 2]

From Tables 1 and 2, it can be seen that an optical beacon is advantageous on a general road and a radio wave beacon is advantageous on a highway in terms of the amount of traffic information and the time delay of its provision. . FM multiplex broadcasting has become medium.

The vehicle navigation device 4 includes a distance detector 5 for detecting the traveling distance of the vehicle, a direction detector 6 for detecting the traveling direction of the vehicle, and a G for measuring the position of the vehicle.
Based on the PS receiver 7 and the traveling distance of the vehicle detected by the distance detector 5 and the traveling direction of the vehicle detected by the direction detector 6, the position of the vehicle on the XY coordinates is calculated. The current position on the road map is obtained while obtaining the current position on the road map, and the current position on the road map is obtained from the position information of the own vehicle measured by the GPS receiver 7, and the current position is obtained while complementarily performing map matching. A control processor 8 comprising an ECU for performing route guidance to a destination and performing overall control and necessary processing, and a map information storage medium in which road map information based on digital map data is stored in advance. 9 and
A storage medium reproducing apparatus 10 for selectively reading out road map information of a required area from the storage medium 5; a predetermined road map is displayed on a screen based on the read road map information; On the road map
A display device 11 for displaying the current position of the own vehicle in an updated manner as the vehicle travels, and an input command given to the control processing device 8 to select and specify a map to be displayed on the display device 11 and to change the setting of the display scale. And an operation device 12 that can perform various input operations such as arbitrarily setting a destination on a road map, and a voice synthesizer 13 that outputs route guidance and instructions of various operation procedures by voice.
And a speaker 14.

Each of the FM multiplex broadcast receiver 1, radio wave beacon receiver 2, and optical beacon receiver 3 has a built-in computer, and the FM multiplex broadcast has a high radio wave intensity, and the traffic information can be received by passing the beacon. At certain times, traffic information is received as needed, and the received traffic information is updated and stored in the internal memory together with the data of the provided time.

The FM multiplex broadcast transmits traffic information by using a vacant portion of a general FM broadcast. When the FM multiplex broadcast receiver 9 is selected for the FM broadcast, the traffic information is not received. It becomes possible.

Upon receiving a request for traffic information from the control processing unit 8, the FM multiplex broadcast receiver 1, the radio beacon receiver 2, and the optical beacon receiver 3 respectively determine the traffic information and the provision time stored in the internal memory. The data is sent to the control processing device 8.

Then, the control processor 8 controls the internal VIC
The traffic information and the provision time data sent from each receiver are temporarily stored in the S memory, the most suitable data is selected, and the content of the selected traffic information is displayed on the screen of the display device 11. .

FIG. 2 shows that the content of the traffic information in the navigation image displayed on the screen is the mark MA of the traffic congestion point.
1, MA2, MA3,..., A mark MB of a closed road, a mark MC of a reduced lane, a mark MD of a construction site, and the like are shown as examples. Also,
Here, a guidance route RL from a current position P searched to avoid a traffic jam or a traffic stop to a destination (here, a case where the map is set in a map area outside the screen is shown) is shown. Have been.

The present invention is configured as described above. In particular, under the control of the control processor 8, the FM multiplex broadcast receiver 1, the radio beacon receiver 2, and the optical beacon receiver 3 respectively receive the signals. Each traffic type provided by the received traffic information is identified, the traffic information received by each receiver is selected based on the identified road type, and the selected traffic information is displayed. I have.

As a method of identifying the type of road to which the received traffic information is to be provided, it is necessary to previously identify whether the road to be provided is a general road or an expressway in the traffic information by VICS. Put the code data,
The control processor 8 decodes the code data.

The traffic information by VICS is obtained by dividing roads on a map to be provided with information into link units.
Since it is created as data of the degree of congestion along with the link number, the control processing device 8
It is also possible to identify whether the road to be provided is an ordinary road or an expressway from the link number of the traffic information.

Specifically, when selecting the traffic information received by each receiver on the basis of the identified road type, the control processing device 8 displays the self-display information displayed on the map based on the road map data. It is determined whether the current position of the car is on a general road or an expressway, and when it is determined that the vehicle is on a general road, the traffic information having the largest amount of information received by the optical beacon receiver 3 is determined. Is preferentially selected. When it is determined that the vehicle is on a highway, the traffic information having the largest amount of information received by the radio beacon receiver 2 is preferentially selected.

At this time, when the latest traffic information is not received by the optical beacon receiver 3 or the radio beacon receiver 2, the latest traffic information received by the FM multiplex broadcast receiver 1 is selected. become.

Therefore, the traffic information received by the FM multiplex broadcast receiver 1, the radio beacon receiver 2, and the optical beacon receiver 3 according to the type of the road, whether it is a general road or an expressway, is information. It is possible to select an advantage in terms of quantity and display appropriate traffic information according to the traveling state of the own vehicle.

The selection of the traffic information received by the FM multiplex broadcast receiver 1, the radio wave beacon receiver 2, and the optical beacon receiver 3 is performed, for example, for each predetermined area obtained by dividing a road map into a mesh.

Further, according to the present invention, under the control of the control processing unit 8, the provision time of the traffic information received by the FM multiplex broadcast receiver 1, the radio wave beacon receiver 2 and the optical beacon receiver 3 is set between the respective receivers. The traffic information received by each receiver is selected on the basis of the difference in, and the selected traffic information is displayed.

More specifically, the control processing device 8 selects traffic information received by the FM multiplex broadcast receiver 1, the radio beacon receiver 2, and the optical beacon receiver 3,
The traffic information having the latest pseudo provision time calculated in consideration of the delay time of providing the traffic information set in advance between the receivers is selected.

On a general road, reception of traffic information by the radio wave beacon receiver 2 is the earliest, followed by reception by the FM multiplex broadcast receiver 1 and reception by the optical beacon receiver 3.

At this time, for example, the reception delay time of the FM multiplex broadcast receiver 1 is set to 5 minutes and the reception delay time of the optical beacon receiver 3 is set to 10 minutes based on the reception by the radio beacon receiver 2. I have. The provision time of the traffic information received by the radio beacon receiver 2 is T1, the provision time of the traffic information received by the FM multiplex broadcast receiver 1 is T2, and the traffic received by the optical beacon receiver 3 is T1. When the provision time of information is T3,
Each pseudo offer time is T1, T2 + 5 minutes, T3 + 1
Calculated as 0 minutes.

On an expressway, the reception of traffic information by the radio wave beacon receiver 2 has the highest priority, followed by the reception by the FM multiplex broadcast receiver 1 and the reception by the optical beacon receiver 3. Therefore, when the providing times of the traffic information are the same, the data received by the radio beacon receiver 2 is selected.

On general roads, the data received by the optical beacon is basically better than other broadcast media in both the amount of information and the freshness of the information. If it is older than 10 minutes, it is determined that the data received by FM multiplex or radio beacon has higher reliability.

On the highway, on the other hand, the reception data of the radio wave beacon is basically better than other broadcast media in both the amount of information and the freshness of the information, but there is a difference in the provision time.
If the multiplex is 5 minutes or more and the optical beacon is 10 minutes or more, it is determined that the received data of the FM multiplex or the radio beacon has higher reliability.

Therefore, it is possible to select a broadcast medium that is most advantageous in terms of information amount and freshness from among the traffic information received by the FM multiplex broadcast receiver 1, the radio wave beacon receiver 2, and the optical beacon receiver 3, respectively. become.

Further, according to the present invention, the traffic information received by the FM multiplex broadcast receiver 1, the radio wave beacon receiver 2, and the optical beacon receiver 3 under the control of the control processing unit 8 specifies the type of road to be provided. And the difference between the provision time of each received traffic information between the receivers is determined, and the traffic information received by each receiver is determined based on the difference between the identified road type and the calculated provision time. The selected traffic information is displayed.

Therefore, of the traffic information received by the FM multiplex broadcast receiver 1, the radio wave beacon receiver 2, and the optical beacon receiver 3, it is advantageous in terms of the information amount (detail) and the freshness of the information. Choose something
It is possible to obtain appropriate and up-to-date traffic information according to the traveling state of the own vehicle.

FIG. 3 shows a flow of processing in the control processing device 8 at that time.

When an instruction to receive traffic information is given from the operation device 12, the control processing device 8 enters a traffic information reception mode, and receives the signals through the FM multiplex broadcast receiver 1, the radio wave beacon receiver 2, and the optical beacon receiver 3. Then, the updated traffic information is read into the VICS memory (step S1).

Next, the control processor 8 determines whether or not the type of road to which the traffic information received by each receiver is to be provided is a general road (step S).
2).

At this time, if it is a general road, the control processing device 8 adds the predetermined reception delay time of 10 minutes to the provision time of the traffic information received by the optical beacon receiver 3 to set the pseudo provision time. Calculated (step S3), the provision time of the traffic information received by the FM multiplex broadcasting receiver 1 is added to the predetermined reception delay time of 5 minutes to calculate a pseudo provision time (step S4), and the radio beacon reception is performed. Machine 2
The provision time of the traffic information received as described above is directly used as the pseudo provision time (step S5). Then, traffic information having the largest amount of information on the general road and the latest pseudo provision time is selected (step S6).

As the reception delay time, the time required from the time when traffic information is collected by a sensor for detecting the running condition of a vehicle installed on the road to the time when traffic information is edited and provided at the center (provide delay time) It is set in consideration of. Then, the traffic information of the receiver having the latest pseudo provision time is selected (step S10). As a result, it is possible to select a broadcast medium having a large amount of traffic information and new information.

At this time, if the road is not a general road, the control processing device 8 considers the road type to be an expressway and then, as in the case described above, the optical beacon receiver 3, F
The pseudo provision times of the traffic information received by the M multiplex broadcast receiver 1 and the radio beacon receiver 2 are calculated (steps S7 to S9). Then, traffic information having the largest amount of information on the expressway and the latest pseudo provision time is selected (step S10).

The above-described traffic information selection process is performed for each predetermined area divided in advance into a mesh, and is completed by covering all the predetermined areas (step S1).
1).

[0049]

As described above, in the vehicle traffic information display device according to the present invention, when receiving traffic information broadcast by a plurality of types of broadcast media such as FM multiplex broadcast, radio beacon, and optical beacon, each broadcast is received. The traffic information received by the respective devices identifies the road types to be provided, and selects the broadcast media based on the identified road types, and displays the traffic information based on the selected broadcast media. Therefore, there is an advantage that it is possible to select an advantageous one in terms of the amount of information (the degree of detail of information) and display appropriate traffic information according to the traveling state of the own vehicle.

Further, according to the present invention, the broadcast media is selected based on the difference between the provision times of the traffic information received by the respective broadcast receivers between the respective receivers, and the traffic based on the selected broadcast media is selected. Since the information is displayed, it is possible to always select the most advantageous one in terms of the freshness of the information and obtain the latest traffic information.

Further, according to the present invention, the type of road to which the traffic information received by each broadcast receiver is to be provided is identified, and the difference between the provision times of the received traffic information between the receivers. Is selected, and the broadcast media is selected based on the difference between the identified road type and the determined providing time, and the traffic information by the selected broadcast media is displayed. Degree) and the freshness of the information can be selected to obtain appropriate and up-to-date traffic information according to the traveling state of the vehicle.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a vehicle traffic information display device according to the present invention.

FIG. 2 is a diagram showing an example of a state in which the contents of traffic information by VICS received in a navigation image are marked.

FIG. 3 is a diagram showing a flow in the control processing device when selecting traffic information received by the FM multiplex broadcast receiver, the radio wave beacon receiver and the optical beacon receiver in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 FM multiplex broadcast receiver 2 Radio wave beacon receiver 3 Optical beacon receiver 4 Vehicle navigation device 8 Control processing device

Claims (3)

[Claims] 1. A vehicle traffic information system in which a vehicle-mounted receiver receives traffic information broadcast by a plurality of types of broadcast media such as a radio beacon, an optical beacon, and FM multiplex broadcasting, and displays the received traffic information. In the display device,
Means for receiving traffic information for each broadcast medium and identifying a road type for which the respective traffic information is provided; and means for selecting a broadcast medium based on the identified road type. A traffic information display device for a vehicle, which displays traffic information received by a broadcast medium. 2. Traffic information for vehicles that receives traffic information broadcast by a plurality of types of broadcast media such as a radio beacon, an optical beacon, and FM multiplex broadcasting by a receiver on a vehicle and displays the received traffic information. In the display device,
Means for receiving the traffic information and the provision time thereof for each broadcast medium, and means for selecting the broadcast medium based on the difference between the broadcast media of the provision time of the received traffic information, and the selected broadcast medium Traffic information display device for displaying traffic information received by the vehicle. 3. Traffic information for vehicles that receives traffic information broadcast by a plurality of types of broadcast media such as a radio beacon, an optical beacon, and FM multiplex broadcasting by a receiver on a vehicle and displays the received traffic information. In the display device,
Means for receiving traffic information and its provision time for each broadcast medium, means for identifying the type of road to which the received traffic information is to be provided, and a difference between broadcast media for the provision time of each received traffic information. And means for selecting a broadcast medium based on the difference between the identified road type and the determined providing time, and displaying traffic information received by the selected broadcast medium. Traffic information display device.