JP3237787B2 - Navigation equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation device.

[0002]

2. Description of the Related Art FIG. 3 schematically shows a conventional navigation system, which is used for a vehicle. In FIG. 3, 21 is a CD-ROM storing map information, and 22 is a C-ROM.
CD changer for reading map information from D-ROM,
23 is a positioning device, 24 is a central processing unit (CPU), 25 is a map number storage device, and 26 is an image display device.

Next, the operation of the above conventional example will be described. The user can use the C containing the map information predicted to be necessary in advance.
The D-ROM 21 is set on the CD changer 22 installed in the moving body. In addition, the map number storage device 25
Stores a correspondence table of maps and map numbers in which the whole country is divided into several regions. Upon receiving the positioning result from the measuring device 23, the CPU 24 determines which map includes the current position from the data in the map number storage device 25, and determines the map number of the map including the current position in the CD changer 22. Put out The CD changer 22 selects a map corresponding to the received map number from the CD-ROM 21 and sends it to the CPU 24. The CPU 24 displays the received map information on the image display device 26 together with the current position. When the current position is outside the currently displayed map, a map including the current position is selected again from the CD-ROM 21 and displayed on the image display device 26 together with the current position.

[0004]

However, in such a conventional navigation device, an external map information storage device must be installed in a moving body, and much map information is always stored in the external map information storage device. There is a problem that map information that is not stored in the map storage device in the moving body cannot be obtained even if necessary.
The present invention is intended to solve the aforementioned conventional problems, and an object the improvement of the completeness map information, the usability of the miniaturization of the navigation device installed in the mobile, that reduce the weight.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a positioning device capable of positioning its own position and a plurality of positioning devices.
A determination device that determines information of a necessary map piece on the traveling direction side based on the current position measured by the positioning device among the map pieces divided into a plurality of map pieces ; A radio device for transmitting information to a map fragment transmitted from the base station to the base station, and a map received from the base station.
An internal map storage device that stores pieces of information, and an image display device that displays the map pieces , and further displays a map piece that includes the current position measured by the positioning device on the image display device. And a control unit for storing information of a plurality of map pieces existing on the moving direction side of the map piece including the current position in the internal map storage device.

[0006]

DETAILED DESCRIPTION OF THE INVENTION The present invention, by the arrangement, transmits a signal of the information necessary map piece to the base station, receives the information of the map element corresponding to the information of the necessary map pieces transmitted from the base station it is possible to display the map piece by, map piece
The completeness of the information of the vehicle can be improved and the navigation equipment installed on the mobile body can be reduced in size and weight, and the map piece corresponding to the traveling direction does not include the current position, Because it is stored in the storage device, even if the current position moves from the current map piece to the next area, based on the stored map piece information, it is possible to quickly display the map piece , Necessary map piece information in the traveling direction of the moving object is displayed without the route setting by the user.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the navigation apparatus according to the present invention will be described below with reference to FIGS. In the configuration diagram of the navigation device in FIG. 1, 1 is a positioning device that can measure its own position, 2 is a map number storage device, 3 is an image display device that displays map information, and 4 is a device that allows the user to input the route on which the moving body travels An input device, a wireless device 5 capable of transmitting and receiving signals from the CPU, a wireless device 6 of a base station for wirelessly transmitting and receiving map information to and from a mobile object, and an external map 7 for storing a map installed in the base station A storage device, 8 is an internal map storage device for storing map information received from the base station, 9 is a CPU of a navigation device installed in the moving body, 10 is a CPU for controlling the base station, and 11 is a moving object. An antenna for the wireless device 5 to be installed, and 12 is an antenna for the wireless device 6 to be installed in the base station.

[0008] In the navigation conceptual diagram of FIG. 2, the mark △ indicates the current position, the mark □ indicates the position at the time of the previous measurement, the mark 々 indicates the position at the time of the last two measurements, the thick line indicates the planned route input, and the planned traveling direction. , Vertical and horizontal thin lines represent the boundaries of each map (map piece) .

Next, the operation of the navigation apparatus according to this embodiment will be described. In the external map storage device 7 installed in the base station in advance,
A map of the whole country is stored, and a number is assigned to each map. The user uses the input device 4 to input a road number that will pass in advance, such as National Route 3 or Prefectural Road 52. The CPU 9 determines which map includes the current position obtained by the positioning device 1 from the data in the map number storage device 2, and outputs a map number including the current position to the wireless device 5. The map number in this case is E-4 (FIG. 2). The wireless device 5 is a CPU 9
And sends a map transmission request to the base station wirelessly. The base station radio 6 receives the map transmission request from the radio 5 and issues the request to the CPU 10. CPU
Reference numeral 10 selects a map of the map number included in the request from the external map storage device 7 and transmits it from the wireless device 6 as map information. The wireless device 5 outputs the map information obtained by receiving the signal from the wireless device 6 to the CPU 9. CPU
9 receives the signal from the wireless device 5 and displays the map information on the image display device 3 together with the current position.

Thereafter, the CPU 9 selects five map numbers from the map number storage device 2 in the order from the current position including the planned route input from the input device 4 and outputs the map numbers to the wireless device 5. In this case, E-3, F
-3, G-3, G-4 and H-4. Radio 5 is C
It receives a signal from PU 9 and issues a map transmission request to the base station wirelessly. The base station radio 6 receives the map transmission request from the radio 5 and issues the request to the CPU 10.
The CPU 10 selects a map of the map number included in the request from the external map storage device 7 and transmits the selected map from the wireless device 6 as map information. The wireless device 5 receives signals from the wireless device 6 and obtains E-3, F-3, G-3, and G-
4 and H-4 are stored in the internal map storage device 8.

The moving body moves along a previously input route, and the current position obtained by the positioning device 1 is E.
When the map deviates from the map displayed on the image display device 3 from the map on the map -4 to the map on the map E-3, the map including the current position is displayed.
(E-3) is selected from the internal map storage device 8 and displayed on the image display device 3 together with the current position. After that, CPU 9
Selects the number of the map that is the fifth closest to the current position, including the scheduled route, from the map number storage device 2 and outputs the selected number to the wireless device 5. In this case, it is H-3. The wireless device 5 receives the signal from the CPU 9 and wirelessly issues a map transmission request to the base station. The base station radio 6 receives the map transmission request from the radio 5 and issues the request to the CPU 10. The CPU 10 selects a map of the map number included in the request from the external map storage device 7 and transmits the selected map from the wireless device 6 as map information. The CPU 9 controls the H-3 obtained by the wireless device 5 receiving the signal from the wireless device 6.
Is stored in the internal map storage device 8.

When the planned route is not input via the input device 4 in advance, the traveling direction of the moving body is calculated based on the current position obtained by the measurement position 1 and the position obtained by the previous and last positionings. Is determined by the CPU 9,
A map (E-4) including the current position is displayed, and five pieces of map information (E-
3, E-5, F-3, F-4, and F-5) are obtained from the external map storage device 7 of the base station via the wireless devices 5 and 6 in the same procedure as described above. The information is stored in the map storage device 8.

[0013]

As described above, according to the present invention,
By transmitting the information of the map pieces determined to be necessary by radio from the base station having the external map storage device to the mobile device having the wireless device and the internal map storage device, the information of the map pieces can be obtained. It is possible to improve the completeness and reduce the size and weight of the navigation device installed on the moving body. Even if the map piece corresponding to the traveling direction does not include the current position,
Because it is stored in the internal map storage device in advance, even if the current position moves from the current map piece to the next area, the map piece can be displayed quickly based on the stored map piece information. For example, even if the route is not set by the user, necessary information of the map piece in the traveling direction of the moving object is displayed, so that it is possible to provide a user-friendly navigation device.

[Brief description of the drawings]

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

FIG. 2 is a conceptual diagram illustrating navigation in one embodiment of the present invention.

FIG. 3 is a configuration diagram of a navigation device in a conventional example.

[Explanation of symbols]

1,23… Positioning device, 2,25… Map number storage device,
3, 26: image display device, 4: input device, 5: wireless device, 6: wireless device, 7: external map storage device, 8
... internal map storage device, 9 ... CPU, 10 ... CPU
, 11: Antenna for radio equipment, 12: Antenna for radio equipment, 21: CD-ROM, 22: CD changer, 24: CPU.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G01C 21/00 G08G 1/137 G09B 29/10

Claims (1)

(57) [Claims] 1. A a positioning apparatus capable of positioning its own position, double
A determination device that determines necessary map piece information on the traveling direction side based on the current position measured by the positioning device among the map pieces divided into a plurality of pieces , and a signal related to the necessary map piece information based on the determination information. Map piece transmitted to the station and transmitted from the base station
Wireless device for receiving the information of the map piece, an internal map storage device for storing information of the map piece received from the base station, and an image display device for displaying the map piece , further comprising the positioning device The map piece including the current position determined by the above is displayed on the image display device, and information of a plurality of map pieces existing on the moving direction side of the moving body of the map piece including the current position is stored in the internal device. A navigation device comprising control means for storing the data in a map storage device.