JP2603781B2 - Map data storage device and route guidance device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a map data storage device for storing a road map, and a route guidance device for guiding a traveling route using data stored in the map data storage device.

[0002]

2. Description of the Related Art Hitherto, as a route guidance device for guiding a traveling route, a route guidance which sets a traveling route by sequentially registering singular points such as intersections and bridges on the traveling route. Devices are known.

In this type of map display device, the coordinates (latitude / longitude) of a singular point are read from a general road map to which latitude / longitude coordinates are assigned, for example, 135 degrees east longitude.
A singular point is registered by inputting the read latitude / longitude as a numerical value such as 35 degrees north.

[0004]

For this reason, in the conventional route guidance apparatus, it is necessary to sequentially read and register the coordinates of a singular point from a road map, and the setting of the travel route is troublesome and time-consuming. There was a problem.

When the coordinates of a singular point are read from the road map as described above, the coordinates of the singular point are attached to the road map at predetermined intervals. Based on the coordinates of the latitude and longitude surrounding the point, the only option is to read intuitively.
There was also a problem of lack of accuracy.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has been made to provide a map data storage device and a route guidance device capable of easily and accurately registering a singular point on a traveling route. .

[0007]

That is, the map data storage device of the present invention, which has been made to achieve the above object, has the structure shown in FIG.
As shown in the example, an identification number is set for each preset singular point.
And atlas imparting road map is printed, mark on the map book
The printed identification number and the actual singular point corresponding to the identification number
Singularity data consisting of coordinates representing the position and the name of the singularity
A ROM card stored for each of the above singularities ;
It is characterized by consisting of .

Further, as shown in FIG. 1, the route guidance device of the present invention is a route guidance device for guiding a traveling route using the above-mentioned map data storage device.
A mounting section on which the OM card can be detachably mounted, an input terminal for inputting an output signal from a position detection device for generating a detection signal indicating the current position, and the identification number,
An operation unit for inputting the order along the fixed path, each time the ID number from the operation unit is input, reads the singular point data corresponding to the identification number from the ROM card mounted in the mounting portion, said Storage means for sequentially storing the read singularity data; and storing the singularity data from the storage means in the storage order.
By reading, identify the singular point that will be traveled next
Then, based on the coordinates in the read singular point data and a detection signal indicating the current position input through the input terminal,
Traveling direction calculating means for calculating the traveling direction and the distance from the current position to the next singular point to be traveled; and reading the traveling direction and the distance calculated by the traveling direction calculating means.
Display control means for displaying on the display device together with the names in the singularity data .

[0009]

[Action and Effect of the Invention] The map data storage device of the present invention as described above, consists of a pair of atlas and ROM cards, the ROM card, an identification number printed on the atlas
And coordinates representing the actual position of the singular point corresponding to this identification number
And singularity data consisting of
It is stored in. Therefore, according to the map data storage device of the present invention, the identification number of a desired singular point is read from the road map printed on the atlas , and the ROM card is read in a predetermined manner.
By attaching to the device and specifying the read identification number,
Causes the reader to read the coordinates representing the actual position of the singular point corresponding to the identification number and the name of the singular point from the ROM card
be able to. Then, the read data is placed at the position of the singular point.
Since the data represents the location and name, for example,
Can be used for vehicle driving guidance etc. as described in
Be used as notes for destinations such as salesmen and salesmen.
Can also be. Also, the ROM card contains the information printed on the atlas.
Identification number and the actual position of the singular point corresponding to this identification number
Stores data consisting of coordinates representing the position and the name of the singular point
Image data for drawing road maps, etc.
Is extremely small compared to storing
And can be realized at low cost.

Next, in the route guidance apparatus according to the present invention, when an identification number is input through the operation unit, the storage means stores the identification number.
The singular point data corresponding to the identification number is read from the ROM card and stored. Further, if the singularity data is stored in the storage means , the traveling direction calculating means can store the singularity data from the storage means.
By reading the data in the storage order,
Singular point to be specified, and the coordinates in the read singular point data
And a detection signal from the position detection device input from the input terminal, the traveling direction and the distance from the current position to the next singular point to be traveled are calculated, and the display control unit calculates the calculated traveling direction. And the distance are read by the traveling direction calculation means.
It is displayed on the display device together with the name in the issued singular point data .

Therefore, in the route guidance device of the present invention,
Reading an identification number assigned to singular points on the planned travel route from the printed roadmap atlas, this read identification
By simply inputting numbers along the travel route in order via the operation unit, the coordinates and names of singular points on the travel route can be registered.
You. Therefore, compared to the conventional device, the setting of the travel route
Can be performed easily and accurately,
In contrast, it is possible to always guide the traveling route accurately
Become. Further, the route guidance device of the present invention provides
The direction of travel from your location to the next singular point to be traveled and
It only displays the distance and the name of its singularity.
Like a general navigation device, the display means
Although the figure cannot be displayed, the device configuration
Can be simplified, and the size and weight of the device can be reduced.
You. That is, the map data storage device and the route guidance of the present invention
The device is a simple portable type as described in the embodiment described later.
An extremely useful technology for realizing a navigation device
Can be.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. First, FIG. 2 is a block diagram illustrating a configuration of a portable route guidance device to which the present invention is applied, FIG. 3 is a perspective view illustrating an appearance of the device main body, and FIG. 4 is a top view similarly illustrating an appearance of the device main body. .

As shown in FIG. 2, the portable route guidance device according to the present embodiment includes a well-known microcomputer including a CPU 2, a ROM 4, a RAM 6, and an input / output port 8, and a traveling direction from a current position along a traveling route. A display unit 10 composed of a liquid crystal display device for displaying distance and distance, and a GPS (Gl.
The apparatus main body 14 includes a signal processing unit 12 that processes a transmission signal from an artificial satellite for an obal positioning system to generate latitude data and longitude data representing a current position.

As shown in FIG. 3, the apparatus main body 14 has the above-described components housed in a main body case 16 formed in a box-like and portable size. A display opening 16a for exposing the display screen 10a of the stored display unit 10 to the outside is formed.

A light receiving unit 22 for receiving a command signal (infrared light) transmitted from the operation unit 20 for setting a traveling route shown in FIG. 2 is provided on the upper surface of the main body case 16. A command signal from the operation unit 20 can be input to the input / output port 8 via the interface 22.

Next, on the left side of the main body case 16, a ROM in which data relating to a singular point on a road map is registered in advance.
A card mounting opening 32 for detachably mounting the card 30 is formed therein. The inside of the card mounting opening 32 serves as the above-described mounting section for holding the ROM card 30 and reading singular point data from the ROM card 30. 2 is provided.

On the other hand, a GP
An input terminal 42 for inputting a reception signal from a reception antenna 40 for receiving a transmission signal from an S (Global Positioning System) artificial satellite is provided. The input terminal 42 is connected to the input terminal 42 via a connector 44 and a cable 46. Connecting the receiving antenna 40 to the signal processing unit 12
A transmission signal from a GPS artificial satellite can be input to the GPS receiver.

Further, on the lower surface of the body case 16,
The battery pack 50 is detachably mounted, and power can be supplied from the storage battery in the battery pack 50 to the above-described units in the apparatus main body 14. Next, the ROM card 30 uses the intersection where the national road, the prefectural road and the other major roads intersect as a singular point, for each intersection.
Intersection addresses P0001, P000 as identification numbers
A road map as shown in FIG. 5 (a) with 2,.

Then, the ROM card 30 has
As shown in (b), for each intersection on the road map, an intersection consisting of an intersection address, coordinate data (latitude data and longitude data) representing the position of the intersection, and intersection name data representing the name of the intersection Data is registered.

In FIG. 5B, the symbol N attached to the latitude data represents north latitude, and the symbol E attached to longitude data represents east longitude. Although the road map shown in FIG. 5 (a) does not include a road without an intersection address, an intersection name, a road name, a place name, etc., in order to make the description easy to understand, the road map is not actually included in the atlas. The printed road map is
The above-mentioned intersection address is attached to a general road map, and roads without intersection addresses, intersection names, road names, place names, and the like are also described.

Next, in the route guidance apparatus of the present embodiment configured as described above, when setting the traveling route, the CPU
2 and the route guidance process executed by the CPU 2 when guiding the traveling route according to the set traveling route will be described with reference to flowcharts shown in FIGS. 6 and 7, respectively.

FIG. 6 shows a route input process executed when the user inputs a travel route setting command through the operation unit 20. As shown in FIG. 6, when the route input process is started, first, in step 100, in order to store the intersection data as the singular point data on the traveling route in the input order, the registration number i has an initial value “1”. Is set.

Next, in step 110, it is determined whether or not the user has input an arbitrary intersection address Pj (j: a number such as 0001 assigned to each intersection) through the operation unit 20. Wait for the intersection address Pj to be input. Then, when the intersection address Pj is input,
The process proceeds to step 120, where the intersection data (hereinafter, referred to as Pj data) corresponding to the input intersection address Pj is stored in the ROM attached to the card connector 34.
Read from the card 30.

Next, in step 130, as shown in FIG. 8A, the Pj data read in step 120 is displayed on the display unit 10 together with its registration number i. The Pj data is stored in the registration number i
Is stored in the RAM 6 as the intersection data of the intersection Qi.

In the following step 150, it is determined whether or not the user has input a travel route setting end command via the operation unit 20, so that the end of the route input is determined. If so, the process is terminated as it is, and if the end instruction of the route input is not input, the registration number i is incremented in step 160, and then the process returns to step 110.

Next, FIG. 7 shows a route guidance process repeatedly executed by the CPU 2 after the execution of the route input process. As shown in FIG. 7, when this process is started, first in step 200, the intersection data stored in the RAM 6 is read in order from the intersection Q1 of the registration number 1 stored first in order. , The initial value “1” is set to the registration number i.

Next, at step 210, the current position is detected by reading the output data (latitude data and longitude data) from the signal processing section 12. In the subsequent step 220, coordinate data (latitude data and longitude data) representing the position of the intersection Qi is read from the intersection data of the intersection Qi stored in the RAM 6,
A Qi direction calculation process is performed as a traveling direction calculating means for calculating a distance and a traveling direction from the detected current position to the intersection Qi.

Next, at step 230, the calculated Q
It is determined whether or not the vehicle has passed the intersection Qi based on whether or not the i direction has been reversed. If the vehicle has not passed through the intersection Qi, the process proceeds to step 240, where the intersection name data is read from the intersection data of the intersection Qi stored in the RAM 6, and as shown in FIG. Then, the processing as display control means for displaying the calculated distance to the intersection Qi and the traveling direction on the display unit 10 is executed, and the process returns to step 210 again.

In FIG. 8B, an inverted triangle A indicates a target (ie, an intersection Qi), and a triangle C displayed in a circle B indicates a traveling direction with respect to the target. In step 240, when the traveling direction changes, the traveling direction is displayed by changing the inclination of the triangle C in the circle B corresponding to the traveling direction.

On the other hand, if it is determined in step 230 that the vehicle has passed the intersection Qi, the process proceeds to step 250, where the registration number i is incremented. And the following step 2
At 60, the data of the intersection Qi of the registration number i is stored in the RAM 6
It is determined whether or not the intersection Qi to be passed next is registered by determining whether or not the intersection Qi is stored. If the intersection Qi is registered, step 210 is performed again.
Then, if the intersection Qi is not registered, the process is terminated.

As described above, when the intersection address Pj is inputted from the operation unit 20, the intersection guidance data corresponding to the intersection address Pj is read from the ROM card 30 and the intersection guidance is provided in the route guidance apparatus of this embodiment. The data is sequentially stored in the RAM 6 as singular point data on the traveling route.
Store in. When the setting of the traveling route is completed, the latitude data and the longitude data indicating the current position output from the signal processing unit 12 and the latitude data and the longitude indicating the position of the next intersection Qi to be traveled stored in the RAM 6 are stored. Based on the data, the traveling direction and the distance from the current position to the intersection Qi are determined, and this is displayed together with the name of the intersection on the display unit 1.
Display at 0.

For this reason, the user reads the intersection address Pj assigned to the intersection on the planned traveling route from the road map printed on the atlas, and operates the operation unit 20 to use this intersection address Pj as the traveling route. Just type along
A travel route can be set. Therefore, it is possible to easily set the traveling route as compared with a conventional device that reads the coordinates of the intersection on the planned traveling route from the map and inputs the coordinates of the intersection.

The coordinates of the intersection Qi on the traveling route are R
Since it is stored in the OM card 30 in advance, there is no error in the intersection coordinates due to the user's reading error unlike the related art, and the coordinates of the intersection Qi can always be registered accurately. Therefore, the next intersection Qi from the current position
The traveling direction to the traveling route is not erroneously calculated, and the traveling route can always be accurately guided.

In the above embodiment, the GPS receiving antenna 40 and the signal processing unit 12 are used as the position detecting device. However, for example, a combination of a speed sensor and an azimuth sensor mounted on an automobile may be used. A device other than a simple GPS may be used as the position detection device. And in this case,
As the speed sensor, for example, a wheel sensor (wheel speed sensor) that detects the speed from the number of rotations of the wheel per unit time
Alternatively, an optical speed sensor such as a laser Doppler speed sensor or the like can be used. As the direction sensor, for example, a gyro sensor or a geomagnetic sensor can be used.

[0035]

[0036]

[0037]

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating the configuration of the present invention.

FIG. 2 is a block diagram illustrating a configuration of the entire portable route guidance device according to the embodiment.

FIG. 3 is a perspective view illustrating an appearance of the apparatus main body 14.

FIG. 4 is a top view illustrating an appearance of the apparatus main body 14.

FIG. 5 is an explanatory diagram illustrating intersection data stored in a ROM card 30.

FIG. 6 is a flowchart illustrating a route input process executed by the CPU 2;

FIG. 7 is a flowchart illustrating a route guidance process executed by the CPU 2;

FIG. 8 is an explanatory diagram illustrating data displayed on the display unit 10 during route input and route guidance.

[Explanation of symbols]

2 ... CPU 4 ... ROM 6 ... RAM 8 ... I / O port 10 ... Display unit 12 ... Signal processing unit 14 ... Main unit 16 ... Main unit case 20 ... Operation unit 22 ... Light receiving unit 30 ... ROM card 34 ... Card connector 40 ... Receiving antenna 4
2 ... Input terminal

Claims (2)

(57) [Claims] An identification number is assigned to each singular point set in advance .
A map book on which the given road map is printed, an identification number printed on the map book , and a map corresponding to the identification number.
From the coordinates representing the actual position of the singular point and the name of the singular point
RO data stored for each singular point
A map data storage device, comprising: an M card. 2. A route guidance device for guiding a traveling route using the map data storage device according to claim 1, comprising: a display device; a mounting portion capable of detachably mounting the ROM card; An input terminal for inputting an output signal from a position detection device that generates a detection signal indicating a position, and the identification number are sequentially input along the planned traveling route.
An operation unit because, the the operation unit every time the identification number is entered, the singular point data corresponding to the identification number is attached to the mounting portion ROM
Storage means for reading from the card and sequentially storing the read singularity data; and reading the singularity data from the storage means in the storage order.
To determine the next singular point to be traveled,
A travel direction calculation for calculating a travel direction and a distance from the current position to the next singular point to be traveled based on the coordinates in the singular point data obtained and the detection signal representing the current position input through the input terminal. Means, and display control means for displaying, on the display device, the traveling direction and the distance calculated by the traveling direction calculation means together with the name in the read singularity data. apparatus.