JPH09264748A - Traffic-information display apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a traffic-information display apparatus by which information is presented to a driver without lowering the visibility of a map display screen even when traffic information and other additional information are displayed so as to be superposed on a map which displays traffic information and other additional information so as to be superposed on the map. SOLUTION: Traffic information is acquired on a traffic-information receiving device 1, the present position of a vehicle is detected in a vehicle-position detection device 2, and various input operations from a user are inputted in an input device 3. Then, map data is stored in a map-information storage device 4, a parameter according to the characteristic of additional information is set in an information control device 5, a rough map according to the set parameter is created, and the additional information is outputted so as to be superposed on the rough map in an output device 6.

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 receiving traffic information transmitted by FM multiplex or other communication means and displaying it on a monitor together with surrounding map data.

[0002]

2. Description of the Related Art Conventionally, as this type of traffic information display device, one described in JP-A-5-72974 is known. This has a configuration in which a traffic information reception display device is added to a mobile terminal display device for displaying a map stored in a CD-ROM, and the traffic information transmitted from the traffic information processing center is displayed on the map in real time. It is displayed on top of.

[0003]

However, in such a conventional traffic information display device, traffic information such as traffic jam information and accident information is overlaid and displayed on a map showing a relatively detailed road network and place names. Therefore, there is a problem that the visibility of the screen is lowered.

Further, the conventional traffic information display device only displays the length of the traffic jam section and the accident information at a certain fixed time, and the driver can display the traffic information based on the temporal transition of the traffic information.
There was a problem that an appropriate route could not be selected.

[0005]

In order to solve such a problem, a traffic information display device according to the invention of claim 1 is a map information storage means for storing map data, and the map information storage means. Map information acquisition means for acquiring map data stored in, additional information acquisition means for acquiring additional information, and parameter setting means for setting parameters based on characteristics of the additional information acquired by the additional information acquisition means. A rough map creating means for creating a rough map from the map data acquired by the map information acquiring means based on the parameters set by the parameter setting means, and the additional information acquisition on the rough map created by the rough map creating means Output means for superimposing and displaying the additional information acquired by the means.

The traffic information display device according to the second aspect of the invention is characterized in that the additional information acquisition means acquires traffic information or a route between arbitrary points.

A traffic information display device according to a third aspect of the present invention includes map information storage means for storing map data,
Map information acquisition means for acquiring the map data stored in the map information storage means, additional information acquisition means for acquiring the congestion information, congestion change amount calculation means for calculating the temporal change of the congestion information, and And output means for superimposing and displaying the temporal change of the congestion information on the map data acquired by the map information acquisition means.

The traffic information display device according to a fourth aspect of the present invention is characterized in that the traffic congestion information is a traffic congestion section length or a traffic congestion degree.

A traffic information display device according to the invention of claim 5 is a map information storage means for storing map data,
Map information acquisition means for acquiring the map data stored in the map information storage means, traffic information acquisition means for acquiring a plurality of traffic information, traffic information storage means for storing the plurality of traffic information, and traffic Change information extracting means for extracting traffic information that has changed over time from among a plurality of traffic information stored in the information storage means, and change information encoding means for expressing the traffic information that has changed over time with a characteristic symbol And output means for superimposing and displaying the characteristic symbol on the map data acquired by the map information acquisition means.

A traffic information display device according to a sixth aspect of the present invention includes a vehicle position detecting means for detecting the current position of the vehicle, and displays the current position of the vehicle in a substantially superimposed manner on the map. It is what

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 is a block diagram showing a configuration of a first embodiment of the present invention.

A traffic information receiving apparatus 1 receives traffic information, and acquires traffic information from FM multiplex broadcasting. The traffic information receiving device 1 selectively receives the FM multiplex signal received by the antenna with the tuner, and detects it with the FM detector. Furthermore, from the detected signal, the multiplexed traffic information is separated by a bandpass filter and taken out,
After the error correction circuit corrects the data error, the traffic information is temporarily stored in the memory. The traffic information is a header that indicates the attributes and classification of the transmitted data, a code that indicates the road and its position and section that are the target of the traffic information, a code that indicates the contents of specific traffic information such as traffic jam information, accident information, construction information, etc. Etc.

Reference numeral 2 denotes a vehicle position detecting device, which comprises a GPS receiver for receiving radio waves from GPS satellites, a vehicle speed sensor for calculating the traveling distance of the vehicle, and a gyro sensor for detecting the vehicle rotation angle. The vehicle current position is calculated by integrating the information output from each of these sensors and then matched with the map data so that the vehicle current position mark is corrected so as to be on the road of the map data.

Reference numeral 3 denotes an input device, which allows the user to switch the display position and scale of the map and set each function by key input operation by the user.

Reference numeral 4 denotes a map information storage device for storing map data, which is composed of a CD-ROM as a recording medium and its drive device. The map data stored in the CD-ROM is divided into meshes for each area, and has a hierarchical structure in which a plurality of scale maps are stored. The road network included in each of the divided areas is represented by a node that represents an intersection or a turning point of a road and a link that connects the nodes, and the position information of the node, the distance between the intersections, and the links that connect to the intersections. The number, the attribute information such as the road width and road type of each link, the intersection name, the road name, and various other place names are recorded as character string data.

An information control device 5 controls the associated devices, processes information input from each device, and outputs a processing result to each of the associated devices.

An output device 6 is composed of a display for displaying map data, current vehicle location, traffic information, etc., a speaker for outputting voice, and a controller for controlling them.

The traffic information display device shown in the first embodiment of the present invention is configured as described above, and when the additional information such as traffic information and route guidance information is superimposed and displayed on the map, the map display Its main purpose is to improve the visibility of the screen.

Usually, in order to present traffic information, route guidance information and the like in a visually easy-to-understand manner, it is required to display these information in a superimposed manner on a map. However, if such additional information is superimposed and displayed on the detailed map data stored in the map information storage device, the amount of information in one screen becomes too large, and the visibility of the map display screen is reduced. Will fall. Therefore, in the first embodiment of the present invention, only a necessary data is selectively extracted from the original detailed map data, and a simplified map is created by simplifying a more complicated shape and the like. Additional information such as traffic information and route guidance information is superimposed on and displayed. In particular, the feature is that the parameter is variably set according to the type of additional information to be superimposed, and a schematic map adapted to the additional information is created based on this parameter.

The operation procedure of the traffic information display device having the above characteristics will be described with reference to the flow chart shown in FIG.

First, in step 101, the entire system is initialized. This is to get the system working,
It is used to set various parameters and secure a work area.

Next, in step 102, when it is determined that the signal output timing from each sensor constituting the vehicle position detecting device is reached, these signals are acquired in step 103 to calculate the vehicle position on the map. To do.

Next, in step 104, step 103
The range of the map displayed on the screen is determined based on the vehicle position calculated in step 1 or the map display range information input by the user from the input device 3.

Then, in step 105, step 10
Based on the map display range determined in 4, it is determined whether or not new map data needs to be read from the map information storage means 4. If it is determined that the map display range specified in step 104 exceeds the range of the map that has already been read, the process proceeds to step 106 and the map data for that region is newly read.

Next, at step 107, it is judged whether or not it is time to acquire traffic information. If it is determined that it is the acquisition timing, the process proceeds to step 108 to acquire the traffic information.

In step 108, traffic information is acquired through FM multiplex broadcasting. First, the FM multiplex signal is received by the antenna and the tuner, and detected by the FM detector. Further, the multiplexed traffic information is extracted from the detected signal by a bandpass filter, the data is corrected by an error correction circuit, and then the traffic information is temporarily stored in a memory.

Next, in step 109, step 108
Select whether to display the traffic information acquired in step 3. on the map. If it is to be displayed, the process proceeds to step 110, where the schematic map parameters for displaying traffic information are set as preprocessing for creating the schematic map. The following conditions are set as the abbreviated map parameters for displaying traffic information.

1) A road network is constructed around links where traffic information is provided. 2) A road network is constructed by giving priority to balance rather than accurately reflecting the road shape. The road width is set to be wide so that it can be displayed to configure the road network. In step 111, whether or not to obtain a route from the departure point to the destination is selected. When obtaining the route, the process proceeds to step 112, and the optimum route between the two points is obtained by applying a method such as the Dijkstra method.

In step 113, a rough map parameter for displaying route guidance information is set as preprocessing for creating a rough map. The following conditions are set as the rough map parameters for displaying route guidance information.

1) A road network is constructed around links selected as routes. 2) Main roads such as expressways, major national roads, and major local roads are also included in the road network. 3) The accuracy of the road shape is maintained to some extent. While constructing the road network, at step 114, a schematic map is created based on the parameters set at step 110 or step 113.

Finally, in step 115, step 11
A display screen is created by superimposing the vehicle position detected in step 103 and the traffic information acquired in step 108 or the guide route found in step 112 on the schematic map created in step 4 and displayed on the monitor. .

FIG. 3 shows a map at a certain scale at a certain scale. With this FIG. 3 as the original data, step 1
FIG. 4 shows the result of creating a rough map using the rough map parameters for displaying traffic information set in 10. Further, FIG. 5 shows a result of displaying the traffic information superimposed on the schematic map of FIG.

Similarly, FIG. 6 shows the result of creating a rough map using the rough map parameters for displaying route guidance information set in step 113, using FIG. 3 as the original data. Further, FIG. 7 shows the result of superimposing the route guidance information on the schematic map of FIG.

As described above, by variably setting the parameters for thinning or transforming the data based on the characteristics of the additional information to be superimposed and displayed, the characteristics of the additional information to be superimposed and displayed, such as traffic information and route guidance information. It is possible to create a simplified map adapted to. As a result, even when the additional information such as the traffic information and the route guidance information is superimposed and displayed on the created schematic map, the amount of information displayed in one screen is appropriately suppressed, and the additional information display The visibility at the time can be improved.

In the above description, the vehicle position detecting device 2 for detecting the current position of the vehicle is provided, and the output device 6 displays the detected vehicle current position in a superimposed manner on the map.
These configurations are not always necessary.

Although the traffic information receiver 1 receives FM multiplex broadcasting, it receives a signal transmitted by radio waves or light waves transmitted from a beacon installed on the side of the road, or a mobile phone. It is not limited to this as long as it receives traffic information provided from the outside, such as those used.

The operating device 3 is equipped with a key switch,
Although the key input from the user is accepted, the invention is not limited to this as long as it receives an operation input from the user, such as a microphone and a voice recognition device, which receives a voice input from the user.

Although the map data storage device 4 uses the CD-ROM as the recording medium, it is not limited to this as long as it can store and read the map data such as another optical disk or a memory card.

Further, the parameter for creating the schematic map for the purpose of superimposing the traffic information is set such that the importance of the link to which the traffic information is provided is set high and the accuracy of the shape is so important. However, the road width is set to be wide, but it is not limited to the contents described above, and any contents that are characteristic and necessary for the map in displaying traffic information may be used.

Further, as parameters for creating a schematic map for the purpose of superimposing the guide information, the importance of the links on the route and the links corresponding to the main trunk lines is set to be high, and the shape of Although the importance level is set to be high to some extent, the content is not limited to those described, and any content that is necessary and characteristic of the map for displaying the guidance information may be used.

Although only the traffic information and the route guidance information have been described as the additional information to be superimposed and displayed on the schematic map, the additional information is not limited to this as long as it is information to be superimposed and displayed on the map. Even in this case, the schematic map is created using the characteristic parameters relating to the additional information.

(Second Embodiment) FIG. 1 is a block diagram showing the basic configuration of the second embodiment of the present invention. The configuration of this block diagram is the same as that shown in the first embodiment of the present invention, and the same processing is performed respectively.

The traffic information display device shown in the second embodiment is configured as described above, and when the traffic congestion information and the traffic regulation information are superimposed and displayed on the road map, the time displacement of the traffic congestion information, That is, the main purpose is to make it possible for users to increase or decrease the congestion section and the degree of congestion.

FIG. 8 is a flow chart showing the processing procedure of the traffic information display device in the second embodiment, and the operation will be described according to this.

First, in step 200, GPS, vehicle speed,
The vehicle position is detected by the vehicle position detection device 2 including each sensor such as a gyro.

In step 201, the display range of the map data is determined around the vehicle position detected in step 200 or an arbitrary position designated by the user.

In step 202, the map data corresponding to the display range determined in step 201 is read from the map information storage device 4.

Next, in step 203, the user uses the input device 3 to select whether or not to display the congestion information. To display the traffic jam information, proceed to step 210,
If the traffic congestion information is not displayed, the process proceeds to step 204.

In step 210, the traffic information receiver 1
To receive traffic information. In step 211, from the traffic information received in step 210, step 201
The traffic jam information included in the display range of the map determined in step 3 is extracted.

In step 212, the traffic congestion information extracted in step 211 is classified into traffic congestion situations such as whether the traffic congestion section length is increasing or decreasing, or whether the congestion degree is increasing or decreasing. The traffic congestion status here means, for example, the increase in the traffic congestion section length from 10 minutes before.
This means a decrease or a change in the average running speed in a congested section.
It is provided as road traffic information in the format as shown in.

In the correspondence table shown in FIG. 9, the external information link number is associated with the link number stored in the map data, and the congestion section length is calculated as a ratio (%) to the length of the entire link. Congestion section distance information, congestion section increase / decrease information that calculates the increase / decrease rate (%) of the congestion section distance from the time when the traffic information was provided last time, and average congestion degree that calculated the average runnable speed (Km / h) between links It consists of speed information and the increase / decrease rate (%) of the increase / decrease rate (%) of the average congestion rate information from the time when the traffic information was provided last time.

Next, in step 213, step 212
A traffic jam information display image is created according to the traffic jam situation classified in. For example, an arrow symbol as shown in FIG. 10 is used to create a traffic jam information display image. In FIG. 10, increase / decrease in the congestion section is represented by the shape of the arrow symbol, and increase / decrease in the congestion degree is represented by the gradation of the arrow symbol. The distance in the traffic jam section is represented by the length of the arrow symbol, and the degree of traffic jam is represented by coloring or the like.

On the other hand, if it is selected in step 203 that the road traffic information is not displayed, a road map image is created in step 204 using the map data read in step 202.

In step 205, the road map image created in step 204 is associated with the traffic jam information display image created in step 213 to create a display image.

Then, in step 206, step 20
The display image created in 5 is output to a display or the like by the output device 6.

FIG. 11 shows an example of a display image created based on the above processing. In this figure,
Traffic information is superimposed and displayed on a schematic map created by deforming an arbitrary road from the map information. Symbol 1 in FIG.
000 indicates that, based on the symbol example shown in FIG. 10, a traffic jam occurs in the section where the arrow symbol is superimposed, and moreover, both the traffic congestion section length and the traffic congestion degree tend to increase. Similarly, the symbol 1001 indicates that a traffic jam occurs in a section where arrow symbols are superimposed, and the traffic congestion section length is
It shows that both the degree of traffic congestion are being eased. Further, symbol 1002 similarly indicates that congestion has occurred in the section where arrow symbols are superimposed, and that neither the congestion section length nor the congestion degree has changed.

As described above, according to the second embodiment, when the driver uses the traffic jam information in the traffic information,
It is possible to present information about traffic congestion sections and temporal changes such as increase or decrease in congestion degree in an easy-to-understand manner.

Therefore, the driver can infer, by acquiring these information, whether the traffic congestion in the section is in the increasing tendency or the tendency to be eliminated in the future, and the more appropriate route avoiding the traffic congestion section. Makes it easier to choose.

In the above description, the vehicle position detecting device 2 for detecting the current position of the vehicle is provided, and the output device 6 displays the detected vehicle current position in a superimposed manner on the map.
These configurations are not always necessary.

In the second embodiment, the traffic information provider transmits the traffic congestion increase / decrease trend information. However, even when the traffic information on the transmission side does not include the traffic congestion increase / decrease information, the vehicle-mounted device By temporarily storing the traffic information on the side and calculating the change in the traffic situation over time, it is possible to display the increase / decrease trend of the traffic jam situation in the same manner.

Further, in the second embodiment, the traffic information is superimposed and displayed on the schematic map, but it may be superimposed and displayed on the normal map display.

Further, although the second embodiment describes the display method considering both the congestion section and the congestion degree, either the congestion section or the congestion degree may be displayed.

(Embodiment 3) FIG. 12 is a block diagram showing a basic configuration of a third embodiment of the present invention. This block diagram is different from FIG. 1 shown in the first embodiment in that
The traffic information storage device 7 is added.

The traffic information storage device 7 is for recording data of a plurality of traffic information received by the user, and is realized by a rewritable recording medium and a drive device thereof.

The traffic information display device shown in the third embodiment is configured as described above, and when the traffic congestion information and the traffic regulation information are superimposed and displayed on the road map, the temporal change of the traffic information is displayed. Its main purpose is to enable the user to instantly understand.

FIG. 13 is a flowchart showing the processing procedure of the traffic information display device according to the third embodiment.
The operation will be described accordingly.

First, in step 300, GPS, vehicle speed,
The vehicle position is detected by the vehicle position detection device 2 including each sensor such as a gyro.

In step 301, the display range of the map data is determined around the vehicle position detected in step 300 or an arbitrary position designated by the user.

In step 302, the map data corresponding to the display range determined in step 301 is read from the map information storage device 4.

Next, in step 303, the user uses the input device 3 to select whether or not to display the congestion information. To display traffic jam information, proceed to step 307,
If the traffic congestion information is not displayed, the process proceeds to step 304.

At step 307, the traffic information receiver 1
To receive traffic information. In step 308, traffic jam information included in the map display range determined in step 301 is extracted from the plurality of traffic information received in step 307.

Next, at step 309, the previously received traffic information is read from the traffic information storage means 7.

Further, in step 310, step 308
Regarding the plurality of traffic information (congested section, accident section, traffic regulation, etc.) extracted in step 3, it is determined whether or not there is information that has changed from the previously received traffic information read in step 309. If the changed information exists, the process proceeds to step 312, and if it does not exist, the process proceeds to step 311.

At step 312, the changed traffic information display is displayed so that the changed traffic information can be distinguished from the normal display by blinking a symbol representing the changed traffic information or changing the display color. Generate an image.

Next, in step 313, step 310
Regarding the traffic information that was determined to have changed in
Writing to the traffic information storage device 7.

In step 311, a traffic information display image is generated using only the information that has not changed in the previous traffic information.

In step 304, step 302
A road map image to be displayed on the screen is generated based on the map data read in.

Further, in step 305, step 30
A display image is generated by superimposing the road map image generated in step 4, the traffic information display image generated in step 311, and the changed traffic information display image generated in step 312.

Finally, in step 306, step 30
The display image generated in 5 is output to a display or the like in the output device 6.

FIG. 14 shows an example of a display image created based on the above processing. In this figure,
Traffic information is superimposed and displayed on a schematic map created by deforming an arbitrary road from the map information.

The symbol 2000 in FIG. 14 is accident information that was not received in the previous processing, and indicates that the accident was the first received immediately after the processing in this processing. Further, a symbol 2001 is accident information that has been continuously received by several times of processing, and indicates that the accident processing is being performed. Further, the symbol 2002 is not received as the accident information in the current process, but is displayed as being in the accident process in the processes up to the previous time, and indicates that the accident process is completed.

As described above, according to the third embodiment, by displaying a characteristic display for information that has changed from the traffic information received in the past, the driver can select the road from the traffic information. It is possible to grasp changes in the situation accurately and promptly.

In the above description, the vehicle position detecting device 2 for detecting the current position of the vehicle is provided, and the output device 6 displays the detected vehicle current position in a superimposed manner on the map.
These configurations are not always necessary.

In the third embodiment, the mode in which the changed traffic information is simply displayed is shown, but the user can select and display any type, for example, accident information or traffic regulation information. May be.

[0086]

As described above, according to the present invention, when creating a simplified map in which detailed map data is simplified, the characteristics of the additional information to be displayed in a superposed manner are considered in advance, and therefore, it is used for the purpose of use. An easy-to-understand schematic map display can be displayed.

By displaying the increasing / decreasing tendency of the congestion degree on the map, it is possible to determine whether the congestion will increase more or less in the future.
The time displacement of the traffic information can be presented, and the driver can easily select a more appropriate route that avoids the traffic jam section.

Further, by displaying the traffic information that has changed over time with a characteristic symbol, it is possible to present information that enables prompt and accurate grasp of changes in road conditions.

[Brief description of drawings]

FIG. 1 is a block diagram showing a system configuration in a first embodiment and a second embodiment of the present invention.

FIG. 2 is a flowchart showing a processing procedure according to the first embodiment of the present invention.

FIG. 3 is a diagram showing a display example of detailed map data according to the first embodiment of the present invention.

FIG. 4 is a diagram showing a schematic map created from the detailed map data shown in FIG. 3 in consideration of displaying traffic information in an overlapping manner.

5 is a diagram showing an example in which traffic information is superimposed and displayed on the schematic map shown in FIG.

FIG. 6 is a diagram showing a schematic map created in consideration of superimposing route guidance information from the detailed map data shown in FIG.

7 is a diagram showing an example in which route guidance information is superimposed and displayed on the schematic map shown in FIG.

FIG. 8 is a flowchart showing a processing procedure according to the second embodiment of the present invention.

FIG. 9 is a diagram showing an example of a correspondence table of traffic congestion sections and traffic congestion levels for links corresponding to link numbers.

FIG. 10 is a diagram showing a symbol example showing a temporal displacement of a congestion section length and a congestion degree.

FIG. 11 is a diagram showing an example of a display screen according to the second embodiment of the present invention.

FIG. 12 is a block diagram showing a system configuration of a third embodiment of the present invention.

FIG. 13 is a flowchart showing a processing procedure according to the third embodiment of the present invention.

FIG. 14 is a diagram showing an example of a display screen according to the third embodiment of the present invention.

[Explanation of symbols]

 1 traffic information receiving device 2 vehicle position detecting device 3 input device 4 map information storage device 5 information control device 6 output device 7 traffic information storage device 1000 traffic jam section display example 1001 traffic jam section display example 1002 traffic jam section display example 2000 accident information display example 2001 Accident information display example 2002 Accident information display example

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhiro Ihara 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (7)

[Claims] 1. A map information storage unit for storing map data, a map information acquisition unit for acquiring the map data stored in the map information storage unit, an additional information acquisition unit for acquiring additional information, and the additional unit. Parameter setting means for setting parameters based on the characteristics of the additional information acquired by the information acquisition means, and a map for creating a rough map from the map data acquired by the map information acquisition means based on the parameters set by the parameter setting means A traffic information display device comprising: a map creating means; and an output means for superimposing and displaying the additional information acquired by the additional information acquiring means on the schematic map created by the schematic map creating means. 2. The traffic information display device according to claim 1, wherein the additional information acquisition means acquires traffic information or a route between arbitrary points. 3. A traffic information display device according to claim 1, further comprising a vehicle position detecting means for detecting a current position of the vehicle, wherein the current position of the vehicle is displayed on the map in a superimposed manner. . 4. A map information storage unit for storing map data, a map information acquisition unit for acquiring the map data stored in the map information storage unit, and an additional information acquisition unit for acquiring congestion information. A traffic information display device for calculating the temporal change of the traffic jam information and displaying the temporal change of the traffic jam information on the map data acquired by the map information acquisition means. 5. The traffic information display device according to claim 4, wherein the traffic congestion information is a traffic congestion section length or a traffic congestion degree. 6. A map information storage unit for storing map data, a map information acquisition unit for acquiring the map data stored in the map information storage unit, and a traffic information acquisition unit for acquiring a plurality of traffic information. Traffic information storage means for storing the plurality of traffic information; change information extraction means for extracting traffic information that has changed over time among the plurality of traffic information stored in the traffic information storage means; Change information symbolizing means that represents changed traffic information with a characteristic symbol,
A traffic information display device comprising: output means for displaying the map data acquired by the map information acquisition means by superimposing the characteristic symbol on the map data. 7. The vehicle position detecting means for detecting the current position of the vehicle is provided, and the current position of the vehicle is superimposed and displayed on the map data acquired by the map information acquisition means. Traffic information display device.