JPH0580696A - Display method for traffic information - Google Patents

Abstract

PURPOSE:To allow the checking of only the information truly necessary for a driver by selecting and displaying only the traffic information on an expressways and general roads within a prescribed range. CONSTITUTION:A triangular mark C as the screen display of a navigation device indicates the present position mark of a vehicle traveling on the expressway L, an IC indicates the next interchange, (a) indicates the jam point on the expressway, and (b) indicates the jam point on the general roads connected to the interchange IC. All the traffic information on the general roads and the expressway existing in the mesh including the present position of the vehicle and the mesh near this mesh is eventually displayed if the kinds of the roads is the general road. The traffic information on the road corresponding to the road name specified by the traffic information received from a beacon (i.e., the road on which the vehicle travels now) is displayed on the screen in the color different from the road information on the other roads in such a case.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road information display method for displaying road information received from a beacon installed on the road on a screen of a navigation device.

[0002]

2. Description of the Related Art Conventionally, in order to assist a vehicle in reaching a destination, a navigation device for displaying current position information to a driver of a vehicle or a passenger (hereinafter simply referred to as "driver") is mounted on a vehicle. It may be done. This navigation device includes a small computer and a display device, detects the traveling distance and the traveling direction by a vehicle speed sensor and a direction sensor, updates the current position of the vehicle, and displays the current position on the display device together with a road map. It can be done.

By the way, the navigation device not only notifies the driver of the current position of the vehicle, but also obtains information on the installation position of the beacon, traffic regulation, traffic congestion, etc. from the beacon on the road to obtain the current position of the vehicle. It can also play a role of correcting the road condition and notifying the driver of the road condition that changes from moment to moment. Here, the beacon is installed on the road and has a relatively narrow range of signals including its own position coordinate information, intersection information, road regulation information, traffic jam / accident information, peripheral guidance information (hereinafter referred to as "road information"). A device that radiates toward the vehicle. By receiving the radiated signal in the vehicle, the vehicle can correct the estimated position of the vehicle and provide useful road information to the driver. .. The road information has a radius of several tens of kilometers to several hundreds of kilometers centered on the beacon position
m road information.

In detail, the information of the own position coordinate includes the position coordinate where the beacon is installed and the road name. In order to correct the own vehicle position when the vehicle passes the beacon. , Is the information that must be given with the highest priority. The intersection information relates to the position and name of the nearest intersection where the beacon is installed, the relative distance and direction from the beacon, the number of branch roads, the direction of each branch road, and the destination or road name by direction. Information etc.

The road regulation information is information on prohibition of entry on a specific road, right turn allowed, left turn allowed, and the like. The traffic jam / accident information is information on the length of traffic jam on a specific road and the occurrence of an accident. The peripheral guidance information is information about buildings, restaurants, etc. that serve as landmarks around the road.

[0006]

By the way, the amount of information obtained from a beacon is a huge amount of about 10 kbytes on a general road and about 6 kbytes on a highway. this house,
Most of the information will be road regulation information and traffic jam / accident information that are particularly necessary for drivers. Therefore,
Even if all such information sent from the beacon is displayed on the screen, it is difficult for the driver to see, and it is confusing to choose which information is necessary and what is unnecessary, rather confusing. become.

[0007] Therefore, an object of the present invention is to provide a road information display method capable of giving only necessary information to a driver among road information in a certain form in consideration of driving safety.

[0008]

The method for displaying road information according to the present invention for achieving the above-mentioned object determines whether or not the vehicle is traveling on a highway (referred to as a highway national road and a motorway). If it is judged and is driving on the highway,
This is a method of selecting and displaying on the screen only the road information of the expressway and the road information on the expressway and the general road (which means a road other than the expressway) within a predetermined range connected to the next interchange (claim) Item 1).

The information that the driver particularly needs while traveling on the highway is road information on the highway and road information on the general road near the next interchange. Therefore, in this way, only the information required by the driver is selected and displayed. Further, the road information may be displayed on the screen separately from road information on other roads (claim 2).

According to this method, if the road information is received from the beacon on the road, the information required by the driver can be displayed on the screen in a form (coloring, hollowing, etc.) that can be distinguished from the other information. Allows you to visually check only the necessary information with a glance at the screen. Further, it is also possible to select and display only the road information corresponding to the road currently being traveled included in the road information received from the beacon in the vehicle (claim 3).

According to this method, it is possible to select and display only the information on the specific road on which the driver thinks the vehicle is necessary. Further, the road information corresponding to the currently traveling road included in the road information received from the beacon may be displayed on the screen separately from the road information on other roads (claim 4).

According to this method, when the road information is received from the beacon on the road, it is possible to display the road information required by the driver on the screen in a form distinguishable from the road information not driven. Allows you to visually check only the necessary information with a glance at the screen.

[0013]

Embodiments will be described in detail below with reference to the accompanying drawings showing embodiments. FIG. 5 shows a block diagram of the vehicle-mounted navigation device. The navigation device 2 includes wheel speed sensors 1a, 1 that detect the rotational speeds of the left and right wheels.
b, a gyro 2a that detects the turning angular velocity (from an optical fiber gyro that reads the turning angular velocity as a phase change of interference light, a vibration gyro that detects the turning angular velocity by using the cantilever vibration technology of a piezo electric element, a mechanical gyro, etc. Selected)), a geomagnetic sensor 3a that detects the absolute direction of the vehicle based on the geomagnetism, a beacon receiver 4, a navigation information providing device 1 connected to the output side of the beacon receiver 4, a geomagnetic sensor 3a, etc. Azimuth estimating unit 5 for estimating the current azimuth of the vehicle based on the accumulation of the data of the initial azimuth and the amount of azimuth change detected by the gyro 2a; The initial position (from the vehicle position set by the keyboard 10 or the beacon receiver 4 A position detecting unit 6, which calculates traveling distance data from the vehicle position), acquires azimuth data output from the azimuth estimating unit 5, and calculates a traveling locus starting from an initial position by dead reckoning navigation; A controller 9 and a CRT, a liquid crystal display, etc., and a display 9 for displaying a road map stored in a map memory 11 as well as vehicle position, azimuth, traveling locus, and road information obtained from the beacon receiver 4. There is.

The map memory 11 is a cassette tape or a CD.
-A storage medium such as a ROM, DAT, semiconductor memory, or IC memory is used, and a road network within a predetermined range as conventionally known,
Stores road map data such as intersections and railway transportation networks. 1 / 12,500, 1 / 25,000, 1/10 for the convenience of the driver
Scales such as 0,000 and 1 / 400,000 are available. Road map data divides road maps (including highway national roads, motorways, general national roads, major local roads, general prefectural roads, general city roads of designated cities, and other living roads) into a mesh, A route consisting of a combination of a node and a link is stored for each mesh (Japanese Patent Laid-Open No. 2-277200).
reference).

Here, a node generally means a coordinate position for identifying a branch point or a bending point of a road. A node representing the branch point is a branch point node and a road bending point (branch point). The node representing (except for) is sometimes called an interpolation point node. The node data includes a node number, a node address of an adjacent mesh corresponding to the node, an address of a link connected to the node, and the like.

A link is formed by connecting each branch point node. The link data includes data such as a link number, addresses of start and end nodes of the link, distance of the link, direction of passing the link, road type (highway or general road), and road name. The navigation controller 8 includes a buffer memory 81, a graphic processor,
It is composed of an image processing memory and the like, and displays a map search, an initial position, a destination, a waypoint input, a map scale switching, scrolling, and road information obtained from the beacon receiver 4 displayed on the display 9. Edit the display data.

The navigation information providing apparatus 1 stores the data signal output from the beacon receiver 4 in the reception data buffer, rearranges the order of the stored data, and stores the data again in the transmission data buffer. Are sent to the navigation device 2 in the order stored in. The beacon is arranged along the road (not shown), and wirelessly transmits information about the installation position coordinates of the beacon and other road information to the beacon receiver 4 of the vehicle. Such information is not transmitted at random, but is periodically transmitted from the beacon according to a fixed order and a fixed promise code. Then, each information is provided with a position coordinate (for example, in the case of traffic jam information, a coordinate indicating from which point to which traffic jam is present) related to the information.

Next, the navigation device 2 having the configuration shown in FIG.
The operation of will be described. First, the driver starts the device before traveling and selects and displays a road map in a predetermined range including the current position from the map memory 11. Then, the vehicle is started, the traveling distance data from the current position is calculated based on the wheel rotation speed signals of the wheel speed sensors 1a and 1b in the position detection unit 6, and the azimuth estimation unit 5 converts the traveling speed data into the angular velocity data of the gyro 2a. Based on the current azimuth.
Then, the position detecting unit 6 calculates the traveling locus data based on the both data and supplies it to the navigation controller 8. The navigation controller 8
The vehicle position / azimuth and traveling locus are displayed on the screen of the display 9 together with the road map. In this case, the road map scrolls according to the traveling direction of the vehicle.

Further, when the current position information is input from the beacon receiver 4 via the navigation information providing device 1 during traveling, the vehicle position data is input again as the initial position of the vehicle. Therefore, the locus displayed on the display 9 is corrected to an accurate locus every time the beacon data is received. further,
When the road information is input from the beacon receiver 4 via the navigation information providing device 1, it is determined whether the road is a highway or a general road based on the road type included in the road information.

If the road type is an expressway, only the road information of the expressway and the road information on the expressway within a predetermined range (for example, a circle with a radius of 20 km) connected to the next interchange and on the general road are selected. .. The highway and the general road within the predetermined range can be selected based on the link data, and the road information can be selected based on the position coordinates included in the road information.

FIG. 1 shows a display example of road information of expressways. In FIG. 1, a triangular mark c is a current position mark of a vehicle traveling on the highway L, an IC is the next interchange, and a
Indicates a congestion point on an expressway, and b indicates a congestion point on an ordinary road connected to the interchange IC. If the road type is a general road, all the road information on the general road and the highway in the mesh including the current position of the vehicle and its adjacent mesh will be displayed. In this case, the road received from the beacon. The road information on the road corresponding to the road name specified by the information (that is, the road on which the vehicle is traveling) is displayed on the screen in different colors from the road information on the other roads.

FIG. 2 shows a display example of road information on this general road.
Shown in. In FIG. 2, a triangular mark c indicates a current position mark of a vehicle traveling on the road L, and d and e indicate congestion points. The congestion point d on the road on which the vehicle is running is displayed in different colors. In addition to the above embodiments, when road information is received on a highway, as shown in FIG.
Congestion points a and b on the general road connected to the upper and next interchange ICs and congestion points f and g on the other general roads may be displayed in different colors. Further, when the traffic congestion information is received on the general road, as shown in FIG. 4, only the traffic congestion information a of the running route L may be displayed, and the traffic congestion information on the route not running may not be displayed at all.
Further, in the above embodiment, the traffic congestion information was handled, but it goes without saying that other road information such as intersection guidance, construction, traffic closure, accidents, etc. may be displayed.

[0023]

As described above, according to the road information display method of the first aspect, if the road information is received from the beacon while the vehicle is traveling on the highway, the road information on the highway required by the driver can be obtained. Since only the road information on the general road near the next interchange is selected and displayed, the driver can confirm only the information that the driver really needs out of the enormous amount of road information.

According to the road information display method of the second aspect, since the road information is displayed on the screen separately from the road information on other roads, the driver only needs to glance at the screen to obtain the necessary information. Only can be blinded. Further, according to the road information display method of claim 3, only the road information on the road on which the vehicle is traveling is selected and displayed on the screen. You can check only the road information.

According to the road information display method of the fourth aspect, the road information corresponding to the currently running road included in the road information received from the beacon is separated from the road information on other roads. Since the information is displayed separately on the screen, the road information required by the driver can be displayed on the screen in a form that can be distinguished from the road information that is not being traveled.
With just a glance at the screen, you can visually check only the necessary information.

In any of the above-mentioned inventions, the driver can glance at only the necessary road information and can grasp it, can drive with a sufficient margin, and can secure traffic safety and smoothness.

[Brief description of drawings]

FIG. 1 is a diagram illustrating a selection display example when congestion information is acquired while traveling on an expressway.

FIG. 2 is a diagram illustrating a color-coded display example when congestion information is acquired while traveling on an ordinary road.

FIG. 3 is a diagram illustrating a color-coded display example when congestion information is acquired while traveling on an expressway.

FIG. 4 is a diagram illustrating a selection display example when congestion information is acquired while traveling on an open road.

FIG. 5 is a block diagram of a navigation device.

[Explanation of symbols]

 1 Navigation Information Providing Device 2 Navigation Device 4 Beacon Receiver 9 Display

Claims (4)

[Claims] 1. A method of displaying road information received from a beacon installed on a road on a screen of a navigation device, comprising: determining whether a vehicle is traveling on a highway, and determining whether the vehicle is traveling on the highway. For example, a road information display method characterized by selecting and displaying on the screen only road information of the expressway and road information on expressways and ordinary roads within a predetermined range connected to the next interchange. 2. A method of displaying road information received from a beacon installed on a road on a screen of a navigation device, which comprises determining whether a vehicle is traveling on a highway and driving the highway. For example, the road information of the relevant highway and the road information on the highway and general roads connected to the next interchange are displayed on the screen separately from the road information on other roads. Display method. 3. A method of displaying road information received from a beacon installed on the road on a screen of a navigation device, which corresponds to a road currently being run included in the road information received from the beacon in a vehicle. A method of displaying road information, characterized in that only road information is selected and displayed on the screen. 4. A method of displaying road information received from a beacon installed on a road on a screen of a navigation device, which corresponds to a road currently being run included in road information received from the beacon in a vehicle. A method of displaying road information, characterized by displaying road information on a screen separately from road information on other roads.