JPH05273916A - Navigation device - Google Patents

Abstract

PURPOSE:To provide a navigation device which can digitally display the coordinate of any arbitrary position on a displayed map picture and can effectively utilize position coordinate data concerning the display processing of the navigation device for a moving body. CONSTITUTION:This device is provided with a position measuring means to measure its own position and to output its own position data, storing means to store map data, display means to display various information, display control means to display the map on the display means based on the map data and to display its own position on the map display based on its own position data, and further, this device is equipped with a position designating means to designate the arbitrary position on the map display, position coordinate calculating means to calculate the longitude and latitude of the real position coordinate corresponding to the designated position and to output them as the position coordinate data, and position coordinate display control means to digitally display position coordinates PCSR and PCAR on the map display.

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 a mobile body, and more particularly to display processing of a vehicle-mounted navigation device.

[0002]

2. Description of the Related Art Conventionally, there is a so-called self-contained navigation device as a positioning device for various moving bodies such as automobiles, aircrafts and ships. This self-contained navigation device obtains a two-dimensional displacement (vector amount) of the moving body from the azimuth data from the azimuth sensor and the speed data from the speed sensor, integrates the two-dimensional displacement at the reference point, It seeks the current position. For example, in the case of an automobile, the current position (data) is obtained by integrating the accumulated traveling distance and the accumulated azimuth obtained from the traveling distance sensor and the azimuth sensor at the reference point. More specifically, for example, the rotation speed of the drive shaft and the number of pulses generated by the rotation speed sensor attached to the drive shaft are preliminarily associated with each other, and from the total number of pulses generated from the reference point to the current position, The calculated traveling distance is calculated by multiplying the calculated distance by the distance correction count, and the integrated azimuth is obtained by accumulating the azimuths obtained by the geomagnetic sensor.

A GPS (Global Positioning System) navigation device has been developed as a positioning device using artificial satellites. This GPS navigation device normally receives radio waves from three or more GPS satellites and
The present position (data) of the receiving point is obtained from the pseudo range data including the time offset of the receiver between the PS satellite and the receiving point (self position) and the position data of each GPS satellite.

As a mode of using these positioning devices as an actual navigation device, from a simple one showing the latitude and longitude of the current position by numbers, a CRT (Cathode Ray Tu)
There is an advanced one that displays various data such as self-position, distance to destination, and moving speed on the map screen displayed on the screen of be).

A navigation device for displaying various data on a CRT screen reads out map data including the calculated current position from a storage medium such as a CD-ROM and screen data from the read map data and the calculated current position data. Is created and output to a CRT for image display. From this display image, the user can grasp his / her current position in association with the map. Further, some of the conventional navigation devices described above display the latitude and longitude of the self position of the moving body numerically on the screen of the CRT.

[0006]

However, in the above-mentioned conventional navigation device, the position coordinate data (latitude, latitude, ...) Of any position on the map display displayed on the CRT is displayed.
(Longitude) cannot be obtained. For example, when setting a common destination among a plurality of napigation devices existing at distant positions, it is possible to accurately transmit the destination to the other party, especially in an unfamiliar place. There was a problem that it was difficult. In addition, even between the navigation devices that display the self-position coordinates by numerical values, the self-position coordinates can be transmitted to the other party, but it is difficult to immediately grasp the relative positional relationship with each other. There was a problem.

Therefore, an object of the present invention is to provide a navigation device capable of displaying the coordinates of an arbitrary position on the displayed map screen by numerical values and effectively utilizing the position coordinate data.

[0008]

In order to solve the above problems, the present invention provides a positioning means for positioning a self position and outputting self position data, a storage means for storing map data,
A navigation device having display means for displaying various kinds of information and display control means for displaying a map on the display means based on the map data and displaying a self-position on the map display based on the self-position data. In the position designation means for designating an arbitrary position on the map display,
A latitude and longitude which are actual position coordinates corresponding to the designated position are obtained, and position coordinate calculation means for outputting as position coordinate data, and based on the position coordinate data, the position coordinates are numerically displayed on the map display. And a position coordinate display control means for displaying.

[0009]

According to the present invention, when an arbitrary position on the map display is designated by the position designation means, the position coordinate calculation means obtains the latitude and longitude which are the actual position coordinates corresponding to the designated position, Output as coordinate data. Thereby, the position coordinate display control means displays the position coordinates (latitude and longitude) as numerical values on the map display based on the position coordinate data.

[0010]

Embodiments of the present invention will now be described with reference to FIGS. FIG. 1 is a block diagram showing the basic configuration when the present invention is applied to an on-vehicle navigation system.

The on-vehicle navigation system 100 includes a geomagnetic sensor 1 for outputting direction data of the traveling direction of the vehicle,
An angular velocity sensor 2 that detects the angular velocity when the vehicle is rotating and outputs angular velocity data, and a traveling distance sensor 3 that outputs the traveling distance data by detecting and integrating the rotational speed of the shaft.
A GPS receiver 4 that receives radio waves from GPS satellites and outputs GPS positioning data; and a system controller 5 that controls the entire navigation device based on azimuth data, angular velocity data, mileage data, and GPS positioning data. Input device 1 for inputting various data
1 and a CD-ROM under the control of the system controller 5
A CD that reads and outputs various data from the disc DK-
It comprises a ROM drive 12 and a display unit 13 for displaying various display data under the control of the system controller 5.

The system controller 5 includes an interface unit 6 for interfacing with the outside, a CPU 7 for controlling the entire system controller 5, a ROM (Read Only Memory) 8 storing a control program for controlling the system controller, R having a non-volatile memory unit (not shown) and writably storing various data
An AM (Random Access Memory) 9 is provided, and the input device 11, the CD-ROM drive 12, and the display unit 13 are connected via a bus line 10. Here, the system controller 5 functions as position coordinate calculation means, position coordinate display control means, and display control means.

The display unit 13 controls the entire display unit based on the control data from the CPU 7 sent via the bus line 10.
4, a buffer memory 15 including a memory such as VRAM (Video RAM) for temporarily storing image information that can be immediately displayed, and a display such as a liquid crystal display device or a CRT based on the image data output from the graphic controller 14. And a display control unit 16 that controls the display of the display unit 17.

The operation of this embodiment will be described below with reference to FIGS. FIG. 2 shows a processing flowchart showing the outline operation of the present embodiment. First, the system controller 5
Calculates, for example, the longitude and latitude of the display position based on the position of the position specifying cursor (step S1). More specifically, as shown in FIG. 5, the longitude and latitude of the position of the position-designating cursor C are set to (LO ₀ , LA ₀ ), and the displayable longitude range and latitude range are unique depending on the scale of the display screen. Since it is decided, the longitude range and the latitude range that can be displayed on the screen at a certain scale are 2ΔLO and 2ΔLA, respectively.
Then, the coordinates of the upper left corner of the display screen (LO ₁ , LA ₁ )
And the coordinates (LO ₂ , LA ₂ ) of the lower right corner are (LO ₁ , LA ₁ ) = (LO ₀ −ΔLO, LA ₀ + ΔLA) (LO ₂ , LA ₂ ) = (LO ₀ + ΔLO, LA ₀ −, respectively. ΔLA). The above is the case where the top and bottom (on the drawing) of the display screen match the north-south direction, that is, the top and bottom of the display screen are parallel to the meridian. If so, the coordinates obtained by rotating the above-obtained coordinates by the angle may be obtained.

Next, based on the obtained longitude and latitude of the display position, the map data of the display position is read from the CD-ROM disc DK into the buffer memory 15 via the bus line 10 and the CD-ROM drive 12. At the same time, the graphic controller 14 draws a map around the display position on the display screen of the display 17 based on the control data from the CPU 7 (step S2). Subsequently, the system controller 5 further overwrites the longitude and latitude of the display position obtained in step S1 with characters (numerical values) on the screen (step S3), and ends the drawing process.

Prior to detailed description of operation, first refer to FIG.
Then, the input device (command
Da) 11 will be described. The commander 11 specifies the position
For moving the cursor or map display on the screen
One direction key D₁~ D_FourAnd the data display mode
Data display mode key K to change the mode₁And the day
Display selection key K to select display / non-display of data ₂And a map
Map display mode key K to select the display mode₃And
I am.

In this case, the following three data display modes are available. 1) A vehicle position display mode in which only the position coordinate data of the vehicle position is displayed. 2) Cursor position display mode that displays only the position coordinate data of the position specification cursor.

3) A mixed mode in which both the vehicle position and the position coordinate data of the position designation cursor are displayed simultaneously. The map display mode has the following two modes.

1) A smooth scroll mode in which a map is displayed centering on the own vehicle or the position designating cursor and the map is smoothly scrolled by the amount of movement of the own vehicle position or the position designating cursor.

2) A page scroll mode in which a map including the own vehicle or the cursor for specifying the position is displayed, and the next map is displayed when the position of the own vehicle or the cursor for specifying the position goes out of the displayed map.

Next, with reference to FIGS. 3 to 8, the operation of the navigation device of this embodiment will be described for each data display mode. In the following description, the case where the smooth scroll mode is used as the map display mode will be mainly described.

FIG. 3 shows a processing flowchart of the position coordinate display processing in the vehicle position display mode and the cursor position display mode. a) Vehicle position display mode First, the vehicle position display mode will be described.

When the system controller 5 first inputs a key from the input device 11, the system controller 5 acquires the content of the input key, and the input data display mode key K1
It is determined whether it corresponds to the cursor position display mode or the own vehicle position display mode (step S10). Note that once this data display mode is set, the same mode is held until the next change is made.

In this case, since it is the vehicle position display mode, the process proceeds to step S11, and the vehicle position is calculated based on the azimuth data, angular velocity data, mileage data and GPS positioning data (step S11). ).

Next, with the position of the own vehicle as the display position, that is, the display position centering on the position of the own vehicle, the map data around the display position is read from the CD-ROM disk DK (step S15) and displayed on the screen of the display 17. A map around the display position is drawn (step S16).

Next, the vehicle position mark and the names of the main buildings are overwritten on the center of the display screen (step S17), and the longitude and latitude of the vehicle position are displayed at the bottom of the display screen (step S18). ), The processing ends.

FIG. 4 shows a display screen in a state where the above position coordinate display processing has been completed. Through the above processing, the vehicle position mark P (indicated by an arrowhead mark in the figure) is displayed in the center of the map display screen, and the vehicle position coordinate P is displayed at the bottom of the screen.
_The longitude and latitude that are _CAR are displayed. More specifically, it is understood that the current vehicle position coordinate P _CAR is a point at 139 degrees east longitude and 36 degrees north latitude. This vehicle position coordinate P
_CAR changes from moment to moment as the vehicle moves. b) Cursor Position Display Mode Next, the cursor position display mode will be described.

First, when there is a key input from the input device 11, the system controller 5 acquires the contents of the input key, and the input data display mode key K ₁
It is determined whether it corresponds to the cursor position display mode or the own vehicle position display mode (step S10).

[0029] In this case, since the cursor position display mode, moves the process to step S13, the movement amount of the display position by the four direction keys D ₁ to D ₄ calculated (step S13), and obtains the display position ..

Next, as the display position of the position-designating cursor, that is, the display position centered on the cursor position, the map data around the display position is stored on the CD-ROM disk DK.
(Step S15), and a map around the display position is drawn on the screen of the display 17 (step S1).
6).

Next, the position designation cursor C and the names of the main buildings are overwritten in the center of the display screen (step S1).
7) Further, the longitude and latitude at the cursor position are displayed at the bottom of the display screen (step S18), and the process is terminated.

FIG. 5 shows a display screen in a state in which the above position coordinate display processing has been completed. Through the above processing, the position specification cursor C (indicated by "+" mark in the figure) is displayed in the center of the map display screen, and the cursor position coordinate P _CSR is displayed at the bottom of the screen, which is the longitude and latitude. ing. More specifically, the current cursor position coordinate P _CSR is 13 east longitude.
You can see that it is at 9 degrees and 36 degrees north latitude. The cursor position coordinate P _CSR is changed by operating the direction keys D _{1 to} D ₄ . Specifically, if the direction key D ₁ is pressed once, the map display moves upward by one step, and if the direction key D ₂ is pressed once,
If the direction map display moves to the left side and the direction key D ₁ is pressed once, the map display moves one step downwards, and if the direction key D ₁ is pressed once, the map display one step moves to the right side Since it moves, the position coordinates of the current position change by an amount corresponding to one step. c) Mix Mode Next, the mix mode will be described. In the following description, the case where the position-designating cursor C is displayed in the center of the screen will be described.

FIG. 6 shows a processing flowchart of the position coordinate display processing in the mix mode. In the case of the mixed mode, since the vehicle position display mode and the cursor position display mode are combined, the processing is shifted to step S11 and step S13 in parallel at the same time.

First, the position of the vehicle is calculated based on the azimuth data, the angular velocity data, the traveling distance data and the GPS positioning data (step S11). At the same time, the amount of movement of the display position by the _four direction keys D _{1 to} D ₄ is calculated (step S13), the display position is obtained, and the position of the position-designating cursor is displayed at the display position, that is, a display centered at the cursor position. The position is set (step S14).

Next, the map data around the display position is C
Reading from the D-ROM disc DK (step S1
5) Draw a map around the display position on the screen of the display 17 (step S16).

Next, the position-designating cursor C is overwritten in the center of the display screen, and overwritten in predetermined positions such as the vehicle position mark P and the names of the main buildings (step S17). Further, the cursor position coordinate P _CSR of the position designation cursor C and the longitude and latitude which are the own vehicle position coordinate P _CAR are displayed at the bottom of the display screen (step S18), and the process ends.

FIG. 7 shows a display screen in the state where the above position coordinate display processing has been completed. Through the above processing, the position-designating cursor (indicated by a "+" mark in the figure) is displayed in the center of the map display screen, and the vehicle position mark P (indicated by an arrowhead mark in the figure) is currently running. It is displayed at a position on the screen corresponding to the position where the cursor is located, and the lower part of the screen displays the longitude and latitude as the cursor position coordinate P _CSR of the position specification cursor C and the longitude and latitude as the own vehicle position coordinate P _CAR. ing. More specifically, the current cursor position coordinate P _CSR of the position-designating cursor C is 139 ° east longitude and 36 ° north latitude, and the current own vehicle position coordinate P _CAR of the vehicle is 139 ° 1 minute east longitude. You can see that it is located at 36 degrees north latitude. This vehicle position coordinate P _CAR changes from moment to moment as the vehicle moves.

As described above, according to this embodiment,
Since the coordinates of any position on the display map screen can be displayed as numerical data, 1) it is easy to understand the display position.

2) It is easy to compare the positions of two points. 3) Easy comparison with other maps such as printed maps. 4) It becomes easy to exchange position data with other users of the navigation device.

5) Destination data from other users of the navigation device can be received and input as numerical values. And so on.

In the above embodiments, only the case where the position designation cursor is displayed at the center of the screen has been described. However, the map display is set to the page scroll mode, and the position designation cursor C is moved by using the direction keys D _{1 to} D _4. It is also possible to move to an arbitrary point on the screen and display the position coordinates of the position.

Further, in the above embodiments, only the case where the position coordinates are displayed has been described. However, the position coordinate data may be directly exchanged between a plurality of navigation devices by wireless communication or the like. It is possible, and in this case, the destination set by a certain navigation device can be immediately used by all navigation devices.

[0043]

According to the present invention, when an arbitrary position on the map display is specified by the position specifying means, the position coordinate calculating means obtains the latitude and longitude which are the actual position coordinates corresponding to the specified position. , Position coordinate data is output, and the position coordinate display control means displays the position coordinates (latitude and longitude) as numerical values on the map display based on the position coordinate data. Or between multiple navigation devices,
It is possible to immediately understand the relative positional relationship with each other, and it is possible to effectively use and share the position coordinate data.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a navigation device.

FIG. 2 is a processing flowchart showing a schematic operation of a napigation apparatus.

FIG. 3 is a detailed processing flowchart (1) of position coordinate display processing.

FIG. 4 is a diagram illustrating a display example in a vehicle position display mode.

FIG. 5 is a diagram illustrating a display example in a cursor position display mode.

FIG. 6 is a detailed processing flowchart (2) of position coordinate display processing.

FIG. 7 is a diagram illustrating a display example in the mixed mode.

FIG. 8 is an explanatory diagram showing a configuration of a commander.

[Explanation of symbols]

100 ... Nagation device 1 ... Geomagnetic sensor 2 ... Angle sensor 3 ... Travel distance sensor 4 ... GPS receiver 5 ... System controller 6 ... Interface part 7 ... CPU 8 ... ROM 9 ... RAM 10 ... Bus line 11 ... Input device (commander) 12 ... CD-ROM drive 13 ... display unit 14 ... graphics controller 15 ... buffer memory 16 ... display control unit 17 ... display C ... position designation cursor D ₁ to D ₄ ... direction key DK ... CD-ROM disc K ₁ ... data display Mode key K ₂ ... Display / non-display key K ₃ ... Map display mode key P ... Current position mark of own vehicle P _CSR ... Cursor position coordinate P _CAR ... Own vehicle position coordinate

Claims (1)

[Claims] 1. A positioning means for positioning a self-position and outputting self-position data; a storage means for storing map data;
A navigation device having display means for displaying various kinds of information and display control means for displaying a map on the display means based on the map data and displaying a self-position on the map display based on the self-position data. In, the position designation means for designating an arbitrary position on the map display, the latitude and longitude which are the actual position coordinates corresponding to the designated position, the position coordinate calculation means for outputting as position coordinate data, And a position coordinate display control means for displaying the position coordinates as numerical values on the map display based on the position coordinate data.