JPH06314301A - Navigation device - Google Patents

Abstract

(57) [Abstract] [Purpose] To realize a navigation device that can perform routing processing for the shortest distance according to the presence or absence of road designation conditions. [Configuration] A GPS receiving unit 1 that creates position information based on a signal from an artificial satellite, a map information recording unit 3 that stores map information, and position information from the GPS receiving unit 1 is displayed on a screen together with map information. The display unit 4, the input unit 5 for inputting various information, and the overall control of each department, and determine the presence or absence of road designation conditions such as "highway" and "toll road avoidance" based on the read map information. However, when there is no road designation condition, a normal routing process is performed, and when there is a road designation condition, the control unit 2 performs a routing process including a designated 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 used for traveling on a road such as an automobile.

[0002]

2. Description of the Related Art In recent years, navigation devices using GPS (Global Positioning System) have been used for navigation to destinations in automobiles and the like. This detects the position of the own vehicle based on the signal sent from the artificial satellite and creates position information.
-The vehicle position is displayed on a liquid crystal screen or the like by superimposing it on the map information (terrain and road information) stored in a large-capacity recording medium such as a ROM. In such a navigation device, two points, a departure point and an arrival point, are designated,
A routing process is performed in which the optimum route between these two points is determined by using the road information in the CD-ROM.

A conventional navigation device will be described below. FIG. 5 is a block diagram of a conventional navigation device. The GPS receiving unit 1 detects the position of the own vehicle based on the signal from the artificial satellite and creates position information, and is composed of a central processing unit, a ROM (Read Only Memory), a RAM (Random Access Memory), etc. The control unit 6 is notified. The position information transmitted from the GPS receiving unit 1 is superimposed on the map information read from the CD-ROM or the like of the map information recording unit 3 by the control unit 6 and displayed on the liquid crystal display or the like of the display unit 4. Therefore, the user operates the touch panel, the keyboard, or the like of the input unit 5 to input the departure point and the arrival point, so that the routing process for determining the optimum route between the two points is performed, and the screen of the display unit 4 is displayed. Is displayed.

An example of the conventional routing process will be described below with reference to the flowchart showing the routing process of the conventional navigation device of FIG. 6 and the drawings showing the display screens of the conventional navigation device of FIGS. First, the input unit 5 is operated so that the control unit 6 controls the map information recording unit 3
The map information around the destination is read from and displayed on the screen of the display unit 4 (S ₁₁ ). An arbitrary road (for example, Fig. Road 3) in the displayed area is represented as polygonal line information by a set of a plurality of continuous points having latitude / longitude information. Next, the user operates the input unit 5, carries out the respective inputs of two points of the starting point S and the destination point E on the road (S _12).
When the input of the starting point S and the arrival point E is completed, the control unit 6
Searches for all routes connecting two points as a polygonal line connecting points in a certain area (S ₁₃ ). The actual display screen is
As shown in FIG. 7, for national highways, a → b → c → d → e
→ 6 points of information connected by f, 2 points of information of prefectural road by 2 points connected by b → h and e → i, and 4 points of expressway connecting g → h → i → j Depending on the information
It is displayed to include the departure point S and the arrival point E.

Next, a route is obtained for each route as a search result (S ₁₄ ), and the route with the shortest distance is selected from the obtained routes (S ₁₅ ). As shown in FIG. 8, the actual display screen is as follows: departure point S → b → c → d → e → arrival point E, and the user can follow the route (national road) selected here to complete the shortest course. Can drive.

[0006]

However, in such a conventional configuration, even if the user wants to use a specific type of road, for example, a highway to shorten the traveling time, it is shown in FIG. As described above, there is a problem in that the national route which is the shortest route is automatically selected, and the desired routing process that satisfies the road designation condition of highway traveling cannot be performed. SUMMARY OF THE INVENTION It is an object of the present invention to solve the above problems and to provide a navigation device capable of performing the shortest distance routing processing according to the presence or absence of a road designation condition.

[0007]

In order to achieve the above object, the present invention provides a GPS receiving section for creating position information based on a signal from an artificial satellite, and a map information recording section for storing map information. A display unit that displays the position information from the GPS receiving unit on the screen together with the map information, an input unit that inputs various information, and is responsible for overall control of each department. Based on the read map information, "highway" and " A configuration including a control unit that determines whether or not there is a road designation condition such as "toll road avoidance", and performs a normal routing process when there is no road designation condition and a routing process including a designated road when the road designation condition exists. It is the one.

[0008]

With this configuration, therefore, various conditions can be satisfied by setting "highway" as the road designation condition for the purpose of shortening the traveling time and "avoiding the toll road" as to avoid the toll road. The desired routing process can be performed.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. However, the same parts as those of the conventional example are designated by the same reference numerals, and a duplicate description will be omitted. FIG. 1 is a block diagram of a navigation device according to an embodiment of the present invention. The GPS receiving unit 1 detects the position of the own vehicle based on the signal from the artificial satellite, creates position information, and transmits it to the control unit 2 including a central processing unit, ROM, RAM and the like. The position information transmitted from the GPS receiving unit 1 is superimposed on the map information read from the map information recording unit 3 by the control unit 2 and displayed on the display unit 4. Therefore, the user operates the input unit 5 to input two points, that is, a departure point and an arrival point, and sets a road designation condition as necessary to determine an optimum route between these two points. Is performed and displayed on the screen of the display unit 4.

FIG. 2 is a flow chart showing the routing processing of the navigation device in one embodiment of the present invention, and FIGS. 3 and 4 are views showing the display screen of the navigation device in one embodiment of the present invention. An example of the routing procedure according to the present invention will be described below with reference to FIGS. First, by operating the input unit 5, the control unit 2
The map information recording unit 3 is caused to read the map information around the destination and is displayed on the screen of the display unit 4 (S ₁ ). An arbitrary road (for example, national highway No. 3) in the displayed area is represented as polygonal line information by a set of a plurality of consecutive points having latitude / longitude information. Next, the user operates the input unit 5 to respectively input two points of the departure point S and the arrival point E on the road and, if necessary, "highway", "toll road avoidance", etc. The road designation condition is additionally input (S ₂ ). When the input of the two points of the departure point S and the arrival point E is completed, the control unit 2 searches for all routes connecting the two points of the departure point S and the arrival point E as a polygonal line connecting the points within the certain area (S ₃ ),
Next, determine the presence or absence of road specified conditions, such as the "highway" and "toll road avoidance" (S _4). The actual display screen is a → b for national roads, as shown in FIG. 7 used in the description of the conventional example.
6 points of information connected by → c → d → e → f, prefectural road is b → h
And 2 pieces of information connected by e → i, and 4 pieces of information of g → h → i → j connecting interchanges on expressways, including start point S and arrival point E. To be done.

If there is no road designation condition, normal routing processing is performed, the route is obtained for each route as a search result (S ₅ ), and the route with the shortest distance is selected from the obtained routes (S ₆ ). The actual display screen is, as shown in FIG. 8 used in the conventional description, the starting point S → b → c → d → e.
→ The arrival point is E and the user selects the route selected here.
You can travel the shortest course by following (national road).

If there is a road designation condition, routing processing including the designated road is performed, and all routes connecting the two points are searched for as a polygonal line connecting points within a certain area (S ₇ ).
To determine whether routes including designation road (S _8). If there is no route that contains the specified road, proceed to S ₅ to the display of the "no route that contains the specified road" on the screen of the display unit 4. If there is a route including the designated road, the route from the departure point S to the entrance of the designated road and the route from the exit of the designated road to the arrival point E are selected by the normal routing process with the shortest route. , {Distance from the starting point S to the entrance of the designated road} + {distance from the entrance of the designated road to the exit of the designated road} + {distance from the exit of the designated road to the arrival point E}
Is selected as the shortest route including the specified road
(S ₉ ). The actual display screen is, for example, when the road designation condition is “highway”, as shown in FIG.
→ h → i → e → arrival point E, and the user can travel the shortest course satisfying the road designation condition by following the route selected here. Further, when the road designation condition is “toll road avoidance”, as shown in FIG. 4, the departure point is S → b → c → d → e → arrival point E, and the user selects the route (national road) ), It is possible to travel on the shortest course that satisfies the road designation condition.

[0013]

As is clear from the above embodiments, the navigation device of the present invention comprises a GPS receiving section for creating position information based on signals from artificial satellites, and a map information recording section for storing map information. A display unit that displays the position information from the GPS receiving unit on the screen together with the map information, an input unit that inputs various information, and is responsible for overall control of each department. Based on the read map information, "highway" and " Avoiding toll roads "
It is determined whether or not there is a road designation condition such as, and if there is no road designation condition, a normal routing process is performed, and if there is a road designation condition, a control unit that performs a routing process including the designated road is used. By setting "Expressway" for the purpose of shortening the traffic, and "Avoiding the toll road" if you want to avoid the toll road, you can perform the desired routing process that satisfies various conditions. Has the effect.

[Brief description of drawings]

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

FIG. 2 is a flowchart showing a routing process of the navigation device in the embodiment of the present invention.

FIG. 3 is a diagram showing a display screen of a navigation device according to an embodiment of the present invention.

FIG. 4 is a diagram showing a display screen of a navigation device according to an embodiment of the present invention.

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

FIG. 6 is a flowchart showing a routing process of a conventional navigation device.

FIG. 7 is a diagram showing a display screen of a conventional navigation device.

FIG. 8 is a diagram showing a display screen of a conventional navigation device.

[Explanation of symbols]

1 ... GPS receiving part, 2, 6 ... Control part, 3 ... Map information recording part, 4 ... Display part, 5 ... Input part.

Claims (1)

[Claims] 1. A GPS (Global Positioning System) that creates position information based on signals from artificial satellites.
Receiving unit, map information recording unit storing map information, GP
The display unit that displays the position information from the S reception unit on the screen together with the map information, the input unit that inputs various information, and the overall control of each department. Based on the read map information, the presence or absence of road designation conditions A navigation device comprising: a control unit for setting a route.