JPH01156618A - Navigation device for moving body - Google Patents

Abstract

PURPOSE:To make the display screen easily visible by setting an optimum scale of which is displayed in accordance with a distance between the present position of a moving body and a destination. CONSTITUTION:Coordinate values (X1, Y1) of a destination are set from a key input part 6A. Subsequently a self-supporting signal is inputted through an antenna 3, a running distance sensor 1 and an azimuth sensor 2, and by a data processing part 8A, coordinate values (X0, Y0) of the present position of a moving body are calculated. Next, by the expression, a distance data between the present position of the moving body and its destination is calculated, and by a scale decision processing part 8B, decision/selection of an appropriate scale to the corresponding map are executed. Thereafter, the corresponding scale is set from a scale key input part 6B, and the corresponding map is displayed. When the moving body moves and the distance to the destination becomes small, the map display in the scale corresponding thereto is executed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a navigation device for a moving object, and in particular, the present invention relates to a navigation device for a moving object, and in particular, the distance between the current position of a moving object such as a moving vehicle and a destination. The present invention relates to a navigation device for a mobile body that is capable of setting an optimal scale of a map displayed on a display unit according to the location of the map.

[Prior Art] Radio waves are transmitted from multiple artificial satellites to various types of moving objects such as ships, aircraft, and automobiles in order to confirm or determine their current positions, moving speeds, etc. The usefulness of GPS positioning devices has been gaining attention. here,
GPS positioning device is the Global Positioning System (Groba)
It is designed to receive radio waves from a plurality of artificial satellites belonging to the I-Positioning System, and to know the current position of a mobile object.

As is conventionally known, positioning operations performed using such a GPS positioning device are usually performed by receiving radio waves from three or more artificial satellites. Then, the radio waves from the plurality of satellites are simultaneously received by the mobile object, and the difference in accuracy between the clock devices installed on the plurality of satellites and the clock device installed in the mobile object is detected. The current position of the moving object is displayed on an appropriate display means after the necessary correction processing for the time lag based on the above is performed. At this time, the necessary map information is displayed on the display means, superimposed on the information regarding the current position.

Also, so-called self-supporting navigation devices have been known for the various types of moving objects described above. This self-contained navigation device is based on the G
Unlike PS navigation devices, it is designed to be able to determine its current location based solely on the data it acquires, without relying on external data such as radio waves from artificial satellites. be.

FIG. 4 is a block diagram showing a conventional device of this type. In Fig. 4, (3) is an antenna for receiving satellite radio waves, and the output side of this antenna (3) is the receiving section (
4) is connected to. (1) is the mileage sensor, (2
) are direction sensors, which are connected to the position detection section (5) as well as the output side of the reception section (4). The output side of this position detection section (5) is a data processing section (8).
), and a key input section (6), a map data storage section (7), and a display section (9) are connected to the data processing section (8).

Next, its operation will be explained. The operator of a mobile object such as a vehicle starts the above-mentioned navigation device for a mobile object by, for example, pressing the start key on the key input unit (6).Then, the operator presses a function key such as an appropriate selection key. Select either the GPS navigation function or the independent navigation function by pressing . Assuming that the former function is selected, the mileage sensor (1) and direction sensor (2) are separated from the position detection unit (5) by a mechanical switch (not shown), and the antenna (3) receives signals. The current position and direction of movement of a moving object can be confirmed or determined only by the satellite radio waves received. On the other hand, when the GPS navigation function cannot be selected due to the presence of various obstacles, the independent navigation function can be selected and only the data acquired from the mileage sensor (1) and direction sensor (2) can be used. Based on this information, the user confirms and determines their current location and direction of movement.

By the way, in such conventional devices, what is displayed on the display section (9) is only a map including the current position of the moving object, and the display scale is fixed. For example, there are cases where the destination of the moving body is far away from the current position and it is not possible to see both at the same time using only one display screen of the display unit (9). In such a case, it is necessary to perform an operation to appropriately switch and display a map containing the current position of the mobile object and a map containing the destination, and furthermore, such an operation must be performed at the same time as the movement of the mobile object. There is also a risk that the movement operation of the mobile object may be neglected.

[Problems to be Solved by the Invention] Since the conventional device has the configuration and operates as described above, what is displayed on the display section is
It is only a map that includes the current location of the mobile object, and
Since the display scale is fixed, for example,
Sometimes the destination of the moving body is far away from the current position and it is not possible to see both at the same time on just one display screen of the display unit, so it is possible to display both the map containing the current position of the moving body and the destination. It is necessary to perform an operation to appropriately switch and display the included map, and this operation must be performed together with the movement operation of the mobile object, so there is a problem that there is a risk that the movement operation of the mobile object may be neglected. Ta.

This invention was made to solve the above problems, and it is possible to set the optimal scale of the map displayed on the display according to the distance between the current position of the moving object and the destination. This eliminates the need to switch between displaying a map that includes the current location of the moving object and a map that includes the destination, and also allows the display screen to be adjusted by selecting the optimal scale according to the display range of the map. An object of the present invention is to obtain a navigation device for a mobile object that is extremely easy to see.

[Means for Solving the Problems] A navigation device for a mobile object according to the present invention includes a position detecting section that detects the current position of the mobile object by receiving signals related to the moving distance, moving direction, etc. of the mobile object; a map data storage section that stores map data; a key input section that inputs required data and commands; and a data processing section that processes the various signals and data to calculate required output data. and a display unit configured to display a map related to the current position of the mobile body and the destination of the mobile body, and the key input unit is provided with a scale key input unit, and the key input unit is provided with a scale key input unit; The data processing section is provided with a scale determination processing section.

[Operation] In the present invention, the optimum scale of the map displayed on the display unit can be set according to the distance between the current position of the moving object and the destination.

[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. 1st
The figure is a block diagram illustrating an embodiment of the present invention. In Fig. 1, (3) is an antenna for receiving satellite radio waves, and the output side of this antenna (3) is the receiving section (
4) is connected to.

(1) is a mileage sensor, (2) is a direction sensor,
These are connected to the position detection section (5) as well as the output side of the reception section (4). Then, this position detection section (5
) is connected to a data processing section (8^) including a scale judgment processing section (8B), and a key input section (6^) including a scale key input section (6B); A map data storage section (7) and a display section (9) are connected to the data processing section (8^).

FIG. 2 is a flowchart for explaining the above embodiment. Moreover, FIG. 3 is an illustrative diagram of the display screen of the display unit in the above embodiment. Here, FIG. 3(A) is
This is an example diagram when the distance between the current position (P) of the moving object and the destination (Q) is considerable; on the other hand, FIG. It is an illustrative diagram when it is close to the ground (Q). In addition, in this Fig. 3, (R
6) to (R@) are the movement routes of the moving body. Also, (X
o, Yo) are the coordinate values of the current position (P) of the moving object, (Xl
, Yl> are the coordinate values of the destination (Q>) of the mobile object,
The distance between the two is represented by: X=X+ XOHH+ (1) Y=Y, -Y, (2). Further, (S,) is a scale as a guide for the scale of the displayed map.

Next, regarding the operation of the above embodiment shown in FIG.
The explanation will be given with reference to the figures and FIG. 3 as appropriate. The operator of a moving object such as a vehicle starts the above-mentioned embodiment device (S20) by, for example, pressing the start key on the key input unit (6^), and then inputs the coordinate values ( X+, Yl) are set from the key input section (6^) (S21). And GPS signals as satellite radio waves,
Self-contained signals that can be captured by the mobile object itself are the antenna (3), mileage sensor (1), and direction sensor (2).
is imported via the data processing unit (8^),
Coordinate values (x,,y,) regarding the current position (P) of the moving object
is calculated (S22).

In the next step (S23), the above (1)
, (2), the current position (P) of the moving object and the destination (
Distance data between Q> is calculated. Based on the calculated distance data, the scale determination processing section (8B) determines/selects an appropriate scale for the corresponding map. The result of this judgment/selection is, for example,
The instruction is given by displaying it at an appropriate location on the display section (9). Then, a corresponding scale is set based on this instruction from the scale key input section (6B) (S24), and subsequently, a corresponding map is displayed under the above-mentioned set scale (S25). .

Now, assuming that the current position (P) of the moving body is on the movement route (R4), the distance between it and the destination (Q) is quite large, and in this case, the distance between it and the destination (Q) is considerably large, as shown in Fig. 3 (A). The map will be displayed on a relatively small scale.

After that, step (
Returning to S22), the current position (P) of the moving object is calculated/corrected, and the movement of the moving object continues.
If the current position (P) of the moving object is displaced to the top of the moving route (R6), then the distance between it and the destination (Q) becomes smaller, as shown in FIG. 3 (R3). The map will be displayed on a scale corresponding to this.

[Effects of the Invention] As explained above, the navigation device for a mobile object according to the present invention includes a position detection section that receives signals related to the moving distance, moving direction, etc. of the mobile object and detects the current position of the mobile object. , a map data storage unit configured to store predetermined map data, a key input unit for inputting required data and commands, and data for processing the various signals, data, etc. to calculate required output data. It is configured to include a processing unit and a display unit configured to display a map related to the current position of the mobile body and the destination of the mobile body,
The key input section is provided with a scale key input section,
Further, the data processing section is provided with a scale determination processing section, and the optimal scale of the map displayed on the display section can be set according to the distance between the current position of the moving object and the destination. This eliminates the need to switch between displaying a map that includes the current location of the moving object and a map that includes the destination, and also makes the display screen extremely easy to read by selecting the optimal scale according to the display range of the map. This has the effect of becoming.

[Brief explanation of the drawing]

FIG. 1 is a block diagram illustrating an embodiment of the present invention;
FIG. 2 is a flowchart for explaining the above embodiment, FIG. 3 is an illustrative diagram of the display screen of the display section in the above embodiment, and FIG. 4 is a block diagram showing a conventional example. (1) is a mileage sensor, (2) is a direction sensor, (3)
is the antenna, (4) is the receiver, (5) is the position detector, (
6), (6^) are the key input section, (6B) is the scale/key input section, (7) is the map data storage section, (8), (88) are the data processing section, (8B) is the scale judgment section Processing unit, (
9) is the display section. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] (1) A position detecting section that detects the current position of the moving object by receiving signals related to the moving distance, moving direction, etc. of the moving object, a map data storage section that stores predetermined map data, and the necessary information. a key input unit for inputting data and commands; a data processing unit for calculating required output data by processing the various signals and data; and a key input unit for inputting data and commands; A navigation device for a mobile body including a display unit configured to display a map, wherein the key input unit is provided with a scale key input unit, and the data processing unit is configured to perform scale determination processing. A mobile object, characterized in that the mobile object is provided with a section, and is configured to set an optimal scale of the map displayed on the display section according to the distance between the current position of the mobile object and a destination. navigation device.