JPH0835844A - Navigational data selecting device - Google Patents

Abstract

PURPOSE:To fetch significant data suitable for the onward movement of a traveling object by setting such a location window on a map that its length becomes longer as the average speed of the object increases along the average advancing azimuth of the object. CONSTITUTION:Of the information inputted from a navigation system through input terminals 12 and 28, the advancing azimuth and speed of a traveling object are respectively inputted to an advancing azimuth averaging section 14 and speed averaging section 26 and the present location of the object is inputted to a processing section 16 and azimuth and distance calculating section 18. The sections 14 and 26 respectively find the average azimuth and average speed of the object by averaging advancing azimuths and speeds with time and supply the found results to the processing section 16. The section 16 sets a location window based on the present location and average advancing azimuth. The window is set in such a way that the window is longer in the direction along the average advancing azimuth of the object and the length window becomes longer as the average speed of the object increases. The calculating section 18 inputs the names and locations of places existing in the window to a place name memory 20, calculates the azimuths and distances to the places from the present location, and outputs the calculated results to a display device, etc., through an output terminal 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a navigation data selection device for selectively outputting a destination or the like stored in a memory based on navigation data.

[0002]

2. Description of the Related Art As a means for obtaining the current position of a moving body, a system such as Loran or GPS is known. In addition, based on the current position of the moving body obtained by these systems, it is possible to display and output information relating to the destination of the moving body. For example, if a place name and its position are stored in a memory in association with each other and the current position information obtained from the navigation system as described above is used to refer to this memory, for example, a place name within a certain distance from the present position and its position can be displayed. Such data can be selected. By doing this, it is possible to inform the operator of the mobile body of the place name within a certain distance from the current position and its position, the direction and the distance to that place, and suitably support the operation of the mobile body. can do.

[0003]

However, when the place name within a certain distance from the current position and the data related to the position are selected, like the destination of the moving body,
Although it is present at a distance from the current position, it is not possible to suitably extract only the place name and its position that are significant to the moving body.

The present invention has been made to solve the above problems, and when the data is selected from the memory, the weight of the moving body is adjusted according to the traveling direction and the speed of the moving body. The purpose is to make it possible to suitably retrieve significant data for the progress.

[0005]

In order to achieve such an object, the navigation data selection device of the present invention comprises means for inputting the current position, traveling direction and speed of a mounted moving body as information, A means for calculating the average traveling azimuth and the average traveling azimuth by time-averaging the azimuth and the traveling speed, and a long shape along the average traveling azimuth on the map based on the current position and the average traveling azimuth. A means for setting a window at a long position, a place name memory for storing a place name and its position in association with each other, a current position and a place name existing in the position window on the place name memory and its position,
It is characterized by comprising means for calculating the distance and direction to the place name and means for outputting the place name and the distance and / or direction to the place name.

[0006]

In the present invention, first, the current position, traveling azimuth and speed of the mounted mobile body are input as information from the navigation system or the like. The traveling azimuth and speed of the input information are subjected to time averaging, whereby the average traveling azimuth and the average speed are calculated. The average heading obtained by the calculation and the current position input from the navigation system or the like are used to set the position window. The window at this position has a long shape along the average traveling direction on the map, and its length is longer as the average speed is higher. The window of the set position is used to refer to the place name memory that stores the place name memory and the position in association with each other. That is, the direction and distance to the place name and the place name are calculated and output based on the input current position, the place name existing in the position window on the place name memory and the position thereof. Therefore, in the present invention, when the information on the place name and its position is obtained from the place name memory, since the weighting is performed based on the window of the position set according to the average traveling direction, it is possible to identify the place as the destination of the moving body. In addition, data relating to a place name and its position existing at a distance, which is significant for the operation of the mobile body, is appropriately selected. In addition, since the azimuth information used when setting the position window is the average traveling azimuth obtained by time-averaging the traveling azimuths, fluctuations in the traveling azimuth of the moving body in a relatively short period of time are It does not contribute to the setting, and the output of the place name and the distance and / or the direction can be stably obtained. In addition, when moving at high speed, it is possible to display distant place names, etc., making it a highly usable device.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of a navigation data selection device 10 according to the first embodiment of the present invention. The device 10 shown in this figure has a current position traveling direction input terminal 12
And a speed input terminal 28 from a navigation system such as GPS or Loran, which is a device for inputting the current position, traveling azimuth, and speed of the mounted mobile object as information. Of the input information, the traveling azimuth and speed are input to the traveling azimuth averaging processing unit 14 or the speed averaging processing unit 26, and the current position is input to the processing unit 16 and the azimuth distance calculation unit 18.
Travel direction averaging processing unit 14 and speed averaging processing unit 26
Calculates the average traveling azimuth and the average velocity by time-averaging the input traveling azimuth or velocity, and supplies them to the processing unit 16. The processing unit 16 sets a position window based on the current position and the average traveling direction. At that time, the length of the position window is determined according to the average speed. The azimuth distance calculation unit 18 inputs the place name existing in the position window on the place name memory 20 and its position, and calculates the azimuth and distance from the current position to the place name. The azimuth / distance calculation unit 18 outputs the azimuth, distance, and place name obtained by the calculation to a display device or the like via the azimuth / distance place name output terminal 22.

The window at the position set by the processing unit 16 has a shape as shown in FIG. That is, the position window has a long shape along the average traveling direction when viewed from the current position input from the current position traveling direction input terminal 12. On the other hand, the place name memory 20 stores the place names and their positions required by the moving body in association with each other. For example, when the moving body is an automobile, the names of cities, towns and villages, ports, mountains, place names related to historic sites, their positions and effective ranges are stored. When the position window is set by the processing unit 16, the azimuth distance calculation unit 1 moves from the place name memory 20.
8, the place name existing in the position window and its position effective range are output as shown in FIG.

Therefore, according to the present embodiment, when the place name, its position and the effective range are obtained by referring to the place name memory 20, the position window is weighted based on the average traveling direction. However, it is possible to suitably obtain significant data for the moving body, which is present at a distant place such as the destination, from the place name memory 20, and from the azimuth distance calculation unit 18, the azimuth, distance and The place name can be output. In addition, the place names existing on the average traveling direction can be known over a long distance.

Further, in this embodiment, when the processing unit 16 sets the position window, the traveling direction averaging processing unit 1
The average heading obtained by 4 is used. Therefore, even when the traveling direction of the moving body changes in a relatively short time, this change hardly affects the setting of the position window. That is, the position window is set stably, and the data output from the place name memory 20 and the data output from the azimuth distance calculation unit 18 become more stable. When the moving body to be mounted is an automobile, the time relating to the time averaging by the traveling direction averaging processing unit 14 is preferably about 20 to 30 minutes, for example. In general, it is necessary to set the time for time averaging longer for a moving body having a larger deviation in the traveling direction, and conversely, in order to improve the responsiveness of the output of the azimuth distance calculating unit 18 to the change in the traveling direction of the moving body. Needs to set a short time for the time averaging.

The position window can be set by a function such as an ellipse. When the position window is set by such a function, for example, not only data over the distance in the traveling direction can be obtained, but also data around the current position can be obtained in all directions. Of course, a fan shape as shown in FIG. 4 may be used.

In addition, in this embodiment, as shown in FIG. 5, when the average speed is high, the position window becomes long. Therefore, when moving at a high speed, it is possible to know a place name at a longer distance.

FIG. 6 shows the configuration of the navigation data selection device 24 according to the second embodiment of the present invention. In the device 24 shown in this figure, the average velocity obtained by the velocity averaging processing unit 26 is input to the azimuth distance required time calculation unit 30. In addition to the function of the azimuth distance calculation unit 18 in the first embodiment, the azimuth distance required time calculation unit 30 includes the place name memory 2
It has a function to calculate the time required from 0 to the obtained place name. That is, the azimuth distance required time calculation unit 30
When the moving body operates at the average speed obtained by the speed averaging processing unit 26, how much time is required from the current position to the place name obtained from the place name memory 20 (time required) is calculated, This is the azimuth distance place name output terminal 2
2 to a display device or the like.

Therefore, according to this embodiment, the above-mentioned first
In addition to the effect obtained by the embodiment, the effect of providing the required time can be obtained. That is, the operator of the moving body,
By using the required time calculated by the azimuth distance required time calculation unit 30, the moving body can be operated appropriately.

[0016]

As described above, according to the present invention,
When the place name and its position are read from the place name memory and the direction and distance to the place name and the place name are calculated and output, a window of a position having a long shape is set along the traveling direction of the moving body to be mounted and weighted. Since this is done, it is possible to preferably output a place name or the like that is significant to the moving body, although it is present at a distance such as the destination of the moving body, and usability is improved. In addition, since the average heading is used when setting the position window, changes in the heading of the moving body in a relatively short time do not contribute to setting the position window, and stable calculation output is obtained. Become. in addition,
Since the length of the position window is long when the average speed is high, it is possible to know a place name at a long distance when moving at high speed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a device configuration of a navigation data selection device according to a first embodiment of the present invention.

FIG. 2 is a plan view showing the contents of a window at a position in this embodiment.

FIG. 3 is a plan view showing output contents of a place name memory in this embodiment.

FIG. 4 is a plan view showing another example of the shape of the position window.

FIG. 5 is a plan view showing setting of a window length at a position.

FIG. 6 is a block diagram showing a device configuration of a navigation data selection device according to a second embodiment of the present invention.

[Explanation of symbols]

 10, 24 Navigation data selection device 12 Current position Traveling azimuth input terminal 14 Traveling azimuth averaging processing unit 16 Processing unit 18 Azimuth distance calculation unit 20 Geographical name memory 22 Azimuth distance Geographical name output terminal 26 Velocity averaging processing unit 28 Velocity input terminal 30 Azimuth Distance required time calculation unit

Claims (1)

[Claims] 1. A means for inputting the current position, traveling azimuth and speed of a mobile body to be mounted as information, a means for averaging the traveling azimuth and speed over time to calculate an average traveling azimuth and an average speed, and a current position and Based on the average traveling direction, means for setting a window having a shape that is long along the average traveling direction on the map and whose position is longer as the average speed is higher, and the place name and its position are stored in association with each other. The place name memory, and the means for calculating the distance and direction to the place name based on the current position and the place name existing in the position window on the place name memory and the position, and the place name and the distance to the place name and / or A navigation data selection device comprising: means for outputting an azimuth.