JP2001289649A - Navigation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To calculate the running speed while passing in a congested section, based on congestion information of traffic information and display its information superposed on a map to inform the user of detailed congestion levels. SOLUTION: Surrounding map data are read to form map display data. Based on traffic information received from traffic information providing organizations, the running speed for running in a congested section of road is calculated, if there are congested sections in the running direction on the now running road. The congestion information and running speed information are superposed and indicated on a map display screen with information in voice, thus informing the user of detailed congestion levels in front.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation system and, more particularly, to a navigation system for displaying traffic congestion information and traveling speed information on a map display screen.

[0002]

2. Description of the Related Art A conventional navigation system is a GP.
The position of the moving body is measured by calculating the S data and information from various sensors, and the position of the moving body is displayed.
As an example of a conventional navigation device, Japanese Patent Laid-Open No. 10-82654
FIG. 6 shows a processing flow of the “navigation device” disclosed in Japanese Unexamined Patent Application Publication No. H11-163,087. In this device, V multiplex broadcasting
ICS wide area information is obtained, and VICS narrow area information is obtained from a beacon. When these VICS information are received (S602,
S611), and compare with the previously received information. If there is new information, the new information is notified by voice, and is emphasized and displayed for about 15 seconds (S603 to S607, S612 to S61).
6). Also, when about 10 minutes have passed since the information currently being displayed has been received, the display is deleted. FIG. 7 shows a screen display example of a conventional navigation system. In this navigation system, although a traffic jam is displayed, it is not possible to determine the detailed congestion degree of the traffic jam section.

[0003] As an example of a conventional navigation device for displaying traffic congestion, there is a "car navigation device" disclosed in Japanese Patent Application Laid-Open No. 9-311996. This is a device that displays a traffic congestion section and an average speed and warns the driver. This device recognizes the position of the own vehicle on a road map based on latitude and longitude obtained from a GPS system and data such as a running direction and a running speed obtained from a vehicle speed sensor. The congestion data received from the information processing center includes the position information of the congestion section and the average speed of the congestion section. Based on the data, the congestion section on the road map and the average of the congestion section are used. Show the speed on the display. Based on the running speed of the own vehicle and the average speed of the congested section, when the running speed of the own vehicle is in a dangerous range,
Warn the driver.

[0004]

However, in the conventional navigation system, the traffic congestion information always provided to the user is based on the degree of traffic congestion (traffic congestion, congestion, no congestion, unknown traffic) provided by a traffic information provider. ) Only. The traveling speed when passing through that section was not always provided. In sections where there is a lot of traffic but there is no perceived traffic congestion, there is a problem that the actual congestion cannot be grasped unless the travel speed is unknown and there is only traffic congestion without going to that section. Was.

SUMMARY OF THE INVENTION The present invention solves the conventional problem and calculates a traveling speed in a congested section based on congestion information provided by a traffic information providing organization, thereby informing the user of the degree of congestion in detail. An object of the present invention is to provide a navigation system that can perform the navigation.

[0006]

In order to solve the above-mentioned problems, according to the present invention, a navigation system includes a receiving means for receiving traffic information from a traffic information providing organization, an information storage device storing map information, A configuration including information processing means for calculating a traveling speed at the time of passage on a congested section road based on congestion information included in traffic information, and display means for displaying the congestion information and the traveling speed on the corresponding section of the map information in a superimposed manner. And With this configuration, the user can be notified of the degree of congestion in detail.

Further, the information processing means is provided with means for judging the existence of a traffic congestion section in the traveling direction based on the currently traveling road, the traveling direction and the traffic congestion information, and the display means is provided with a traffic congestion section in the traveling direction. A means for outputting the running speed by voice when the vehicle exists. With this configuration,
The user can be notified by voice of the degree of congestion ahead.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to FIGS.

(First Embodiment) In a first embodiment of the present invention, a traveling speed at the time of passing through a congested section road is calculated based on traffic information received from a traffic information providing organization, and the traveling speed is calculated. This is a navigation system that superimposes and displays information along with traffic congestion information of a corresponding section on a map display screen.

FIG. 1 is a functional block diagram of the navigation system according to the first embodiment of the present invention. In FIG. 1, an angular velocity sensor 1 is a means for detecting an angular velocity when the direction of the vehicle changes, and outputting angular velocity data and relative azimuth data. The mileage sensor 2 calculates the number of pulses per one rotation of the wheel by counting the number of pulses in a pulse signal of a predetermined cycle output with the rotation of the wheel, and calculates the mileage based on the number of pulses per rotation. A means for outputting data. The GPS sensor 3 is a GPS
This is a means for receiving radio waves from the S satellite and outputting GPS positioning data, as well as outputting absolute azimuth data of the traveling direction of the vehicle.

The system controller 4 is a means for controlling the entire navigation system based on relative azimuth data, angular velocity data, mileage data, GPS positioning data, and absolute azimuth data. The system controller 4 includes an interface unit 5 that performs an interface operation with an external sensor such as the GPS sensor 3, a CPU 6 that controls the entire system controller 4, and an RO that stores a control program that controls the system controller 4 and the like.
M7. A RAM 8 is provided to store various data such as path data set in advance by a user via the input device 10 in a readable manner. Input device 10, DV
The D-ROM drive 11, the display unit 12, and the sound reproduction unit 17 are connected via the bus line 9.

The input device 10 is a remote control device for inputting various data. DVD-ROM drive 11
Is a DVD-ROM under the control of the system controller 4.
A means for reading various data such as map data including road data and other detailed data from the ROM disk 21. The display unit 12 is a means for displaying various display data under the control of the system controller 4. The display unit 12 includes a graphic controller 13 that controls the entire display unit 12 based on control data sent from the CPU 6 via the bus line 9, and a memory such as a VRAM. A buffer memory 14 for temporarily storing image information that can be displayed immediately, and a display controller 15 for controlling display of a display 16 such as an LCD / CRT display device based on image data output from the graphic controller 13.
And

The sound reproducing unit 17 is a means for reproducing and outputting various audio data under the control of the system controller 4. The sound reproduction unit 17 is a DVD-RO
D / A which performs D / A conversion of audio digital data sent from the M drive 11 or the RAM 8 via the bus line 9
An A converter 18, an amplifier 19 for amplifying an audio analog signal output from the D / A converter 18, and a speaker for converting the amplified audio analog signal into audio and outputting the audio externally
20.

The VICS receiver 22 is a means for receiving traffic information from a VICS center. VICS wide area information is obtained by FM multiplex broadcasting, and VICS narrow area information is obtained from a beacon.

FIG. 2 is a flowchart of the map information display processing. FIG. 3 is a processing flow of traffic jam information display.
FIG. 4 is a diagram of a screen displaying the traveling speed of a vehicle in a congested section.

The operation of the navigation system according to the first embodiment of the present invention configured as described above will be described. When the user inputs a destination or the like with the input device 10, the system controller 4 reads map data or the like stored in the DVD-ROM disc 21 based on the input information and displays the map data or the like on the display unit 12.

The map information display processing will be described with reference to the flowchart of FIG. The map information display processing described below is performed by the CPU 6 or the graphic controller functioning as a reception / recognition unit, an information processing unit, and a display unit.
13 and is executed as part of a main navigation program that controls the entire navigation system to execute a navigation operation.

During execution of the main navigation program, the following map information display processing is periodically performed according to the set contents. (Step 1) The map data around the current position or around the position specified by the user with the input device 10 is stored in a DVD-ROM.
ROM disk 21 to DVD-ROM disk drive
11 and is temporarily stored in the RAM 8. (Step 2) When data necessary for display is stored in the RAM 8, the stored data is converted into map display data through a predetermined conversion process. (Step 3) Display data corresponding to the current position of the vehicle calculated by the CPU 6 and display data of other additional information are created. (Step 4) The map display data and the display data of the vehicle / additional information are stored in the image memory, and the process returns to the navigation program.

Thereafter, at the timing controlled by the display control unit 15, the map display data and the display data of the vehicle / additional information are read from the image memory, and the corresponding display map is displayed on the display 16. Become.

The processing flow for displaying the traffic jam information shown in FIG. 3 will be described. (Step 10) Map data around the current position or around a position designated by the user is read. (Step 11) Map display data is created based on the read map data. (Step 12) It is determined whether or not the traffic congestion information on the road has been received from the VICS center, and if not, the display data creation ends. (Step 13) If it has been received, the traveling speed display data of the congested section is created based on the received congestion information. If the traffic congestion information includes the traveling speed data of the congested section, it is used. If the traveling speed data is not included, the traveling speed is estimated based on traffic volume data, information on the degree of congestion, and the like. As an estimation method, there is a method in which a correlation between a traffic volume or a degree of congestion and a traveling speed is obtained based on past congestion state statistics or the like in the section, and an estimation is performed using the correlation.

The map display data thus created is stored in a map display image memory. As a result, as shown in FIG. 4, the display 16 displays the traveling speed of the vehicle in the congested section in addition to the traffic congestion display.

As described above, according to the first embodiment of the present invention, the navigation system performs the navigation based on the traffic information received from the traffic information provider (VICS center).
The running speed at the time of passing through the congested section road is calculated, and the running speed information is superimposed and displayed on the map display screen together with the traffic congestion information of the corresponding section, so that the congested state can be grasped in detail.

(Second Embodiment) In a second embodiment of the present invention, the traveling speed of a congested section road ahead is calculated based on traffic information received from a traffic information providing organization, and is notified by voice. Navigation system.

The basic configuration of the navigation system according to the second embodiment of the present invention is similar to that of the first embodiment shown in FIG.
This is the same as the embodiment. FIG. 6 is a flowchart of the congestion information notification processing of the navigation system according to the second embodiment of the present invention. With reference to FIG. 6, a traffic jam information notifying process of the navigation system according to the second embodiment of the present invention will be described.

(Step S20) The current position and traveling direction of the vehicle are specified based on the GPS data and information from various sensors. (Step S21) It is determined whether or not the traffic congestion information on the road has been received from the VICS center. If the information has not been received, the process is terminated. (Step S22) If the traffic has been received, it is determined based on the received traffic information whether or not there is a traffic congestion ahead of the road that is currently traveling. If there is no traffic congestion ahead, the process ends.

(Step S23) If there is traffic congestion ahead, the traveling speed of the congested section is obtained based on the traffic congestion information, and voice guidance data corresponding to the traveling speed information is created. (Step S24) The created voice guidance data is D / A converted, and the traveling speed information of the congested section is notified by voice.

In this example, the case where the road ahead in the traveling direction of the vehicle is congested has been described. If there is a congested section on the route obtained by the route search, the traveling speed of the section is displayed. You may. Further, the required time of the entire route may be obtained and displayed from the traveling speed of each section on the route.
It is also possible to determine the required time of the entire route for a plurality of routes and use it for a time-first route search.

As described above, in the second embodiment of the present invention, the navigation system calculates the traveling speed on the congested section road ahead based on the traffic information received from the traffic information providing organization, and outputs the speech. Since the notification is provided, it is possible to know a detailed traffic jam situation by voice.

[0029]

As is apparent from the above description, according to the present invention, the navigation system includes a receiving means for receiving traffic information from a traffic information providing organization, an information storage device storing map information, and a navigation system. Information processing means for calculating the traveling speed at the time of passing through a congested section road based on the traffic congestion information, and display means for displaying the traffic congestion information and the traveling speed superimposed on the corresponding section of the map information, The effect is obtained that the user can be notified of the degree of congestion in detail.

The information processing means is provided with means for judging the existence of a traffic congestion section in the traveling direction based on the road on which the vehicle is currently traveling, the traveling direction, and the traffic congestion information. Means for outputting the traveling speed by voice when the vehicle is present, so that the user can be notified by voice of the degree of congestion ahead, so that the user does not need to move his / her field of view while driving, The effect of acquiring is obtained.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of a navigation system according to a first embodiment of the present invention;

FIG. 2 is a flowchart of a map information display control processing operation of the navigation system according to the first embodiment of the present invention;

FIG. 3 is an operation flowchart of a map display data conversion part of the navigation system according to the first embodiment of the present invention;

FIG. 4 is a diagram of a display screen of road information of the navigation system according to the first embodiment of the present invention;

FIG. 5 is a flowchart of a traffic jam information notification processing operation of the navigation system according to the second embodiment of the present invention;

FIG. 6 is a processing flowchart of a conventional navigation device,

FIG. 7 is a diagram showing an example of a conventional map display.

[Explanation of symbols]

 1 angular velocity sensor 2 mileage sensor 3 GPS sensor 4 system controller 5 interface 6 CPU 7 ROM 8 RAM 9 bus line 10 input device 11 DVD-ROM drive 12 display unit 13 graphic controller 14 buffer memory 15 display control unit 16 display 17 sound reproduction Unit 18 D / A converter 19 Amplifier 20 Speaker 21 DVD-ROM disk 22 VICS receiver

 ──────────────────────────────────────────────────続 き Continuing on the front page F term (reference) 2C032 HB02 HB22 HB24 HC08 HC15 HC22 HC27 HC31 HD04 HD16 2F029 AA02 AB01 AB07 AB13 AC02 AC08 AC09 AC13 AC16 AC18 5H180 AA01 BB13 CC12 FF05 FF12 FF13 FF22 FF25 FF32 JJ25 001

Claims (4)

[Claims] 1. A receiving means for receiving traffic information from a traffic information providing organization, an information storage device storing map information, and a driving speed at the time of passing through a congested section road based on traffic information included in the traffic information. A navigation system comprising: information processing means for calculating; and display means for displaying the traffic congestion information and the traveling speed so as to overlap a corresponding section of the map information. 2. The information processing means further comprises means for judging the presence of a traffic congestion section in the traveling direction based on the road on which the vehicle is currently traveling, the traveling direction, and the traffic congestion information. 2. The navigation system according to claim 1, further comprising means for outputting the traveling speed by voice when a traffic congestion section exists. 3. Receiving traffic information from a traffic information providing organization, calculating a traveling speed when passing through a congested section road based on the congestion information included in the traffic information, and displaying the congestion information and the traveling speed on a map. A traffic jam information display method for a navigation system, wherein the traffic jam information is displayed by being superimposed on a corresponding section of a screen. 4. It is determined that a traffic congestion section exists in the traveling direction based on the road on which the vehicle is currently traveling, the traveling direction and the traffic congestion information. The method according to claim 3, wherein the information is output.