JPH08271272A - Navigation apparatus - Google Patents

Abstract

PURPOSE: To provide a navigation apparatus which attains a navigation operation without updating or revising a CD-ROM and makes it convenient for a user by a method wherein, when a vehicle passes a road not contained in road information, the road is registered as a new road. CONSTITUTION: A navigation apparatus is provided with a GPS reception device 1, with a display device 5 which displays an own-vehicle position, with a CD- ROM drive device 2 which reads out data from a CD-ROM in which map information has been stored and with a control part 4 which comprises a road- information storage memory 4a. When it is detected from road information contained in the CD-ROM that the own-vehicle position is off or when track data on the own vehicle is converted into a straight line and into a node by the instruction of a user so as to start their storage in a road-information memory and the position of the own vehicle is returned to a road by the road information contained in the CD-ROM or when their storage has been finished by the instruction of the user, the road is registered as a new road.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation device for providing road information to an automobile.

[0002]

2. Description of the Related Art In recent years, navigation devices mounted on automobiles have become widespread. The conventional navigation device will be described below.

FIG. 8 is a configuration diagram of a conventional navigation device, FIG. 9 is a road information display example diagram included in the same CD-ROM, and FIG. 10 is a road information display example diagram. In FIG. 8, the navigation device is a GPS receiver 1, a CD-R.
OM drive device 2, operation keys 3, control unit 4, display device 5, GPS (Global Positioning)
System) consisting of an antenna 6.

Next, the operation will be described. Radio waves from GPS satellites are received from the GPS antenna 6, the current position is calculated by the GPS receiving device 1, and the control unit 4 is notified. The control unit 4 sends the map data matching the received measurement position to the CD.
-Reading from the ROM drive device 2, displaying on the display device 5, converting the measurement position into a position on the display device 5, and displaying a map of the point where the current position exists.

Here, the basic function of a general navigation device is to match the position of the vehicle with road data and plot it on the screen. Also, set the destination,
By setting the planned road from the current position,
A guidance function that monitors the correlation between the own vehicle position and the set road information position, issues a warning when the position is deviated, and indicates the traveling direction at an intersection is common.

However, it is a precondition that such a functioning road is described in the CD-ROM, and no consideration is given to other roads, such as newly developed roads. CD-ROM
We have to wait for the update and improvement of the map data of. Normally, the road data on the CD-ROM is as shown in FIG.
It is expressed in the form of connecting straight lines to nodes that represent intersections and road bends.

Generally, GPS positioning information has an error of about 30 meters for military reasons. Therefore, map matching is performed in the navigation device and a plot display is performed so that the own vehicle exists on the road with the highest accuracy. There is. However, the media that provides road information is a CD
-Because it is a ROM, it takes time to update when a new road is created. Further, since it does not correspond to a private road or the like, when passing through an area where road information does not exist, there is a problem that another road is matched as shown in FIG.

[0008]

As described above, the conventional navigation device has a problem that it cannot be guided because there is no road information in the passage of a road having no road information.

The present invention solves the above problem. When a road which is not included in the road information is passed, the information is retained and registered as a new road, thereby updating or revising a memory such as a CD-ROM. An object is to provide a navigation device that enables navigation without waiting.

[0010]

To this end, a navigation device according to the present invention comprises a GPS receiving device, a display device for displaying the vehicle position, a memory drive device for reading data from a memory storing map information, and a road. It is equipped with an information recording memory and a control unit that controls the whole, and when it detects that the vehicle position has deviated from the road information stored in the memory, or when the user's command gives the trajectory data of the vehicle to straight lines and nodes. Converted and started to be stored in the road information memory, and if the own vehicle position returns to the road of the road information stored in the memory, or if the storage is ended by the user's specification, it is registered as a new road It is a thing.

[0011]

According to the present invention, with the above-described configuration, when it is detected that the vehicle position deviates from the road information position, or the user's command converts the locus data of the vehicle into straight lines and nodes, which are stored in the road information memory. When it is determined that the vehicle position has returned to the road indicated by the road information stored in the memory,
Alternatively, when the accumulation is completed by the user's designation, it is registered as new road information. As a result, even roads that are not listed in the memory can be used for navigation because they can be newly registered as road information without waiting for memory update or revision.

Further, by recording the ID of the memory to be used, the date and time of update, etc. at the same time, the use of the registered data is restricted, thereby preventing the memory from being updated or troubles in the memory having different information types. Is possible. In addition, by transferring / saving this registered road data to a portable storage medium such as a memory card or floppy disk, it can be used by another device, and information processing such as adding place name information can be performed externally. You can

[0013]

An embodiment of the present invention will be described below with reference to the drawings. 1 is a configuration diagram of a navigation device according to an embodiment of the present invention, FIG. 2 is a flowchart of plot display processing of the navigation device, FIG. 3 is an example of road information of the navigation device, and FIG. 4 is a road of the navigation device. FIG. 5 is an example diagram of information and GPS positioning information, and FIG. 5 is a flowchart of road departure determination processing of the navigation device.

In FIG. 1, the navigation device is a GP.
S reception device 1, CD-ROM drive device 2, operation keys 3, control unit 4, display device 5, GPS antenna 6, IC card slot 7, FDD (Flexible Disk)
Drive) device 8, and the control unit 4 includes a road information storage memory 4a. This navigation device receives radio waves from GPS satellites from a GPS antenna 6, calculates the current position by the GPS receiving device 1, and notifies the control unit 4 of the current position. The control unit 4 reads the map data that matches the received measurement position from the CD-ROM drive unit 2 and displays it on the display unit 5, and also converts the measurement position into a position on the display unit 5 to display a map display of the current position. To do. Here, as in the flow chart shown in FIG.
Map matching is performed from the PS measurement points and the road information read from the CD-ROM, and a plot of the vehicle position is displayed. After that, a series of processes for performing a navigation operation, such as a warning display when the vehicle deviates from a road different from a preset route and a traveling direction display at an intersection, are performed.

Next, a flow chart of the plot display processing will be described with reference to FIG. In the process of plotting the own vehicle position, after obtaining position information from the GPS (flow 1), the current process content is judged (flow 2), and if the process indicates that the own vehicle position is on the road, the vehicle leaves the road. It is determined whether or not there is a new road registration start instruction from the user (Flow 3, 4).

If neither of these is present, it is judged to be normal plot processing, and map matching processing (flow 5).
After that, the position of the vehicle is plotted (flow 8). If the user leaves the road or a road registration start instruction is given by the user, the position information storage memory is initialized, the position information acquired earlier is stored here (flows 6 and 7), and then the plot processing is performed. Perform (flow 8).

If the current processing content is new road registration, it is determined whether the position information from the GPS has been restored on the road and whether the user has input a registration end instruction. (Flows 9 and 10). If none of the above, it is determined that the registration process is to be continued, the position information is stored in the position information storage memory (flow 7), and then the own vehicle position plot process is performed (flow 8).

When the position information from the GPS is returned to the road, or when the user inputs a registration end instruction, first, the own vehicle position is plotted and then stored in the position information storage memory. A message is displayed on the screen as to whether the registered data is to be registered as a new road (flows 11 and 12), and the user's instruction is awaited. If not registered, the process ends as it is (flow 13).

When registering, the stored position information is converted into road information (flow 14) and registration processing is performed as new road information (flow 15). FIG. 3 shows a plot display example of the vehicle position when the vehicle leaves the road and returns to the road.

Next, an example of the road departure determination processing will be described with reference to the example diagram shown in FIG. 4 and the flowchart of FIG. First, the immediately preceding positioning points x and y are held as x0 and y0 (flow 21), and then the positioning information from the GPS is converted into normal coordinates to be x and y (flow 22). First, the moving azimuth angle θ in which the north direction is 0 degree is calculated (flow 23).

Θ = arctan ((y−y0) / (x−x0)) However, in the case of x−x0 = 0, 0 ° as an exceptional process,
A 180 ° determination process is performed. The difference between this movement angle θ and the accuracy θm of the road information where the vehicle currently exists is the threshold value θ.
If it exceeds the limit, it is determined that the vehicle has left the road (flow 24).

Next, the distance δ from the nearest road information is calculated (flow 25). If this is greater than or equal to the threshold δlimit, it is determined that the road has left (Flows 26, 27,
28).

FIG. 6 is a diagram showing an example of accumulated information in the navigation device according to the embodiment of the present invention, and FIG. 7 is a diagram showing an example of data conversion in the navigation device. Now, it is assumed that there is road information including nodes 1, 2, 3, and 4 in FIG. Here, it is assumed that the road leaves the point a and returns to the road at the point i. As shown in FIG. 7, the contents of the position information storage memory in this case store the accumulated number and all the position information from the point a to the point i.
When converting from this to road information, for example, the road information is configured by points excluding the midpoints of the straight lines of the points c and f, and the coordinate data of the points a and i is set as new intersection information, which is currently in use. It is stored in the road information storage memory 4a together with the identification ID of the CD-ROM (CD-ROM header information) and the corresponding map identifier.

In the navigation operation, the CD-R
At the same time as reading the map data of the corresponding point from the OM, the presence or absence of registered road information corresponding to the map data is determined. If registered road information exists, the registered road information is added to the map data from the CD-ROM. To use.

[0025]

As described above, according to the present invention, new road data can be created from GPS positioning information and registered so that a new road can be created without waiting for the update or revision of the memory such as a CD-ROM. Since it is possible to provide guidance, it is possible to realize a navigation device that is extremely convenient for the user's flights.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a navigation device according to an embodiment of the present invention.

FIG. 2 is a flowchart of plot display processing of the navigation device according to the embodiment of the present invention.

FIG. 3 is an example diagram of road information of a navigation device according to an embodiment of the present invention.

FIG. 4 is an example diagram of road information and GPS positioning information of a navigation device according to an embodiment of the present invention.

FIG. 5 is a flowchart of road departure determination processing of the navigation device according to the embodiment of the present invention.

FIG. 6 is a diagram showing an example of accumulated information in the navigation device according to the embodiment of the present invention.

FIG. 7 is a data conversion example diagram of the navigation device according to the embodiment of the present invention.

FIG. 8 is a configuration diagram of a conventional navigation device.

FIG. 9 is a diagram showing a road information display example included in a conventional CD-ROM.

FIG. 10 is a diagram showing a conventional road information display example.

[Explanation of symbols]

 1 GPS receiver 2 CD-ROM drive device 4 Control part 4a Road information storage memory 5 Display device 7 IC card slot 8 FDD device

Claims (3)

[Claims] 1. A GPS receiving device, a display device for displaying the vehicle position, a memory drive device for reading data from a memory storing map information, and a road information recording memory.
A control unit for controlling the whole is provided, and when it is detected that the vehicle position is separated from the road information stored in the memory, or the locus data of the own vehicle is converted into a straight line and a node by a user's instruction, and the road information is stored. When the vehicle starts to store in the memory and the vehicle position returns to the road of the road information held by the memory,
Alternatively, the navigation device is characterized in that, when the accumulation is completed by the designation of the user, it is registered as a new road. 2. The navigation device according to claim 1, wherein the road information is managed together with the ID of the memory, and the user-registered road information is validated only when a specific memory is used. 3. The road information can be registered in a portable storage medium such as a memory card or a floppy disk, can be used in another device, and can be processed externally. 1. The navigation device according to 1.