JPH08313293A - Apparatus for displaying position of one's own ship - Google Patents

Abstract

PURPOSE: To display a position of one's own ship and a target position on a screen at all times without any manipulation however the ship is separated from the target position, by setting a target position-setting key, a target position memory means, a target position display means and a reduction scale change means, etc. CONSTITUTION: A first reduction scale-determining means 202 and a target position display means 203 are installed in a read only memory 102, and a target position memory means 204 is set in a memory 103. At the same time, a target position-setting key 205 is set in an input means 104. When the target position-setting key 205 is depressed, the first reduction scale-determining means 202 and the target position display means 203 are excited thereby to display a screen center and a target position. Meanwhile, a second sea zone determined by one smaller reduction scale than the presently set reduction scale is set in a display range memory means 113. When one's own ship approaches the target position and enters the sea zone, a second sea zone-detecting means 206 detects the state. The detection excites a second reduction scale-determining means 207 and changes the reduction scale to one larger value.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mounted on a ship and, for example, when a passenger suffers a waterfall accident, the position of the waterfall accident is stored as a target position, and no matter where the ship moves, The present invention relates to a ship position display device that can always display the ship position on a screen.

[0002]

2. Description of the Related Art Conventionally, a track recording device capable of storing a track of a ship and displaying it on a screen has been put into practical use. The outline structure of this track recording device is a positioning device that measures the position of the ship, such as a GPS receiver or a Loran C receiver,
An image memory called a video RAM etc. that stores the screen,
A display device for displaying the image stored in the image memory,
It is configured by a display range storage unit that determines the range of the sea area to be taken into the image memory in association with the scale value and stores the display range, and a scale changing unit that changes the display range stored in the display range storage unit. It

By using this track recording device, it is possible to display and know the track that the ship has traveled, and it is used, for example, to calculate fuel consumption or to identify a place where a large amount of fish has been collected or a place where a large amount of fish has not been collected. are doing. By the way, the conventional track recording device has a means for storing a place where a net is set and displaying the position by a mark or the like, and is provided with a net position display means capable of reaching the place where the net is set again. The added one is in practical use.

Each time the net position is set, the net position display means operates a push button key, reads the current position from the positioning device by the key operation, stores the current position, and writes the position in the image memory, thereby displaying on the screen. The position of the net is displayed with a mark or the like. The network position display means added to the conventional track recording device operates so that the position of the ship is displayed at the center position on the screen. Therefore, when the position of the net moves away from the position of the ship, the position of the net is not displayed on the screen. Therefore, to check the position of the net again, operate the scale changing means to change the scale, or operate the display position moving means to move the display position of the screen and call the position of the net on the screen. It is displayed.

[0005]

By the way, sometimes an accident occurs in which a passenger drops water on a ship. When this water drop accident occurs, it is possible to use the net position display means to store the water drop position and use it to return the ship to the water drop accident position. However, in the conventional track recorder, even if the drop position is stored as described above, the ship does not stop rapidly, so if the ship is far away from the drop position, the drop position will be outside the display screen. Therefore, the ship operator must manually operate the scale changing means or the display position moving means so that both the own ship and the falling position are displayed on the screen.

It is impossible in reality to perform a screen display operation while trying to rescue a person who has fallen into the water.
An object of the present invention is to maintain the state where the ship's position and the target position are always displayed on the screen without any operation in the case of an emergency such as a waterfall accident, no matter how far the ship is away from the target position. It is intended to provide a ship position display device.

[0007]

In the invention of claim 1 of this application, a positioning means for outputting the self-position as a numerical value corresponding to the latitude and the longitude, and a position obtained by this positioning means as a ship position are displayed on the screen. Display means for displaying inside, display range storing means for storing the range of the sea area displayed corresponding to the set scale value, and scale changing means for arbitrarily setting the display range stored in the display range storing means In a ship position display device configured to include a key for setting a target position,
The target position storage means for reading the position where the target position setting key is operated from the positioning means, and the target position stored in the target position storage means and activated by the operation of the target position setting key are displayed in the center of the screen. It is started by operating the target position display means to be displayed and the target position setting key, and the ship position is within the display range stored in the display range storage means with the target position displayed in the center of the screen. It is determined whether or not to do so, and the first scale determining means for giving an appropriate scale value to the scale changing means so that the target position and the own ship position are always displayed on the screen, and the current setting is on the inside of the display screen. Second sea area storage means for storing a second sea area determined by a scale value one level below the scale value,

When the display position of the own ship enters the second sea area stored in the second sea area storage means, the second scale determining means is provided for changing the scale value in the expanding direction. In the device proposed in claim 2, a calculating means for calculating the distance between the target position and the own ship position, the azimuth of the target position and the arrival time from the navigation speed of the own ship to the target position, and the calculating means. The present invention proposes a ship position display device provided with a numerical display means for displaying the result.

Therefore, according to the present invention, only by operating the key for setting the target position, after that, no matter how far the position of the own ship is from the target position, the target position will be centered on the screen of the display means. It operates in so-called rescue mode, which displays the ship position. Further, it is possible to display the distance to the target position and the target position, the azimuth, and the time to reach the target position from the navigation speed of the own ship. Therefore, even in an emergency, the target position, the own ship position, the bearing of the target position, and the like are always automatically displayed, so that the ship can be returned to the target position without fail by manipulating the ship according to these data.

[0010]

FIG. 1 shows an embodiment of the present invention. 10 in the figure
0 is a track recording device that has been conventionally used, and 200 is a new addition part 20 enclosed by a broken line in the track recording device 100.
1 shows a ship position display device according to the present invention configured by adding 1. The track recording device 100 is a central processing unit 101.
And a read-only memory 102 composed of a ROM or the like storing a program for operating the central processing unit 101 in a predetermined order, and a rewritable structure composed of a RAM or the like for temporarily storing input data or the like. Memory 103
And input means 1 such as a keyboard or trackball
04, a display means 105 including a cathode ray tube or a liquid crystal display panel, a display controller 106 for controlling the display means 105, an image memory 107 for storing an image displayed on the display means 105, and a GPS receiver. Or Loran C
Like a receiver, the positioning unit 108 receives a positioning radio wave signal to calculate its own position, and the interface 109 for capturing the position data output by the positioning unit 108.

The central processing unit 101 inquires of the positioning means 108 for position data at appropriate time intervals,
The positioning means 108 is caused to output the position data. The central processing unit 101 takes in this position data, compares it with the position data acquired last time, and writes the position data in the memory 103 if it is different by a predetermined value or more. The read-only memory 102 is provided with an imaging means 111 composed of an imaging processing program. The image forming means 111 defines a display range to be displayed on the screen in a storage area for one screen of the image memory 107 according to the scale value input from the input means 104. In other words, the coordinates of the four corners of the screen (corresponding to the address on the image memory) are defined by longitude and latitude, and these are stored. The past and present position data stored in the memory 103 is written in dots in the image memory 107 whose display range is defined by the scale value. The track of the own ship is stored by the connection of the dots, and the track is displayed on the display means 105.

The read-only memory 102 has an imaging means 11
1, the scale changing means 112 is provided, and the input means 1
When the scale value is input from 04, the relationship between the address of the image memory 107 and the longitude and latitude is rewritten according to the scale value, and the display range is changed by this rewriting. FIG. 2 shows an example of scale values that can be set. In the example shown in the figure, 60 is between 1 / 10,000 and 1 / 50,000,000.
The case where the configuration can be divided and set is shown.

FIG. 3 shows an example of the track display. Display means 1
A mark M indicating the current position of the ship is displayed in the center of the screen displayed on 05, and a line J continuing from the position M of the ship displays a past track. The upper side of the screen points north, and the ship's position M
Is displayed on the numerical display unit 105A with the longitude Xo and the latitude Yo. Here, a method of determining the scale value and the display range displayed on the display screen will be described in detail.

The coordinates of the four corners of the display means 105 can be defined by the longitudes X ₁ and X ₂ and the latitudes Y ₁ and Y ₂ from the set scale values and the dimensions of the display screen. By storing the longitudes X ₁ and X ₂ representing these coordinates and the latitudes Y ₁ and Y ₂ in the display range storage means 113, all positions within the display range on the screen can be defined by longitude and latitude. it can. Therefore, by converting the coordinates given by longitude and latitude into addresses, the own ship position M, the track J, etc. can be written in the image memory 107.

K shown in FIG. 3 indicates a mark indicating the position of the screen displayed by the conventional screen position display means. The net position display mark K will stick out of the screen when your ship goes away,
Removed from screen. Therefore, this halftone position display mark K
In case of displaying the position of the person who dropped water, in order not to lose sight of the position of the person who dropped water, an appropriate scale value is input from the input means 104, and both the net position mark K and the own ship position M are always displayed on the screen. Must be manually operated to display.

On the other hand, in the present invention, the read-only memory 102 is provided with the first scale determining means 202 and the target position display means 203, the memory 103 is provided with the target position storing means 204, and the input means 104 is provided with the target position. When the setting key 205 is provided and the target position setting key 205 is pressed, the first scale determining means 202 and the target position displaying means 203 are activated, and the target position R is displayed at the center of the screen as shown in FIG. indicate.

At the same time, the first scale determining means 202 is
The display area storage means 113 displays the longitude Xo and the latitude Yo of the position M.
Longitude X that determines the display range stored in₁, X₂And latitude Y
₁, Y₂Compared with, the longitude Xo and latitude Yo of the ship position M are
X₁And X₂Range and Y₁And Y₂Within the range of
The first scale determining means 202 is set in the memory 103.
The existing scale value is left as it is. On the other hand, longitude Xo and latitude Y
o is X₁And X₂And Y ₁And Y₂Out of range
For example, the first scale determining means 202 is set in the memory 103.
Switch the scale value that is currently on to the next higher scale value (see Figure 2)
It In other words, increase the scale factor and make it slightly wider than the current display range.
Switch to the scale value displayed on the screen.

On the other hand, in the display range storage means 113, the second sea area N (see FIG. 4) determined by the scale value one level lower than the scale value currently set is set. When the own ship's position M enters this sea area N when the own ship approaches the target position R, the second sea area detecting means 206 detects the state, and the second scale determining means 207 is activated by the detection and one scale value is set. Change to the enlargement direction. That is, the scale value that has defined the second sea area N is given to the scale changing means 112, and the second sea area N is enlarged and displayed on the entire display screen. Along with this, the second scale determining means 207
Inside the screen, a second new one is decided by the scale value on the lower side.
Set the sea area N.

In this way, the second scale determining means 207 makes the second sea area detecting means 2 each time the own ship enters the inside of the second sea area N.
06 detects this, and the second scale determining means 207 switches the scale value to the enlargement direction. This switching operation has a scale value of 1/1
You can continue until you reach 10,000. Thus, according to the present invention, the first scale determining means 202, the second scale determining means 207, and the target position displaying means 203 are activated to display the target position R in the center of the screen, Both the position R and the own ship position M are controlled to be displayed on the screen without fail, and the scale value having the highest enlargement ratio capable of displaying the own ship position M is determined.

FIG. 5 shows an embodiment of the own ship position display device proposed in claim 2 of this application. In this embodiment, in addition to the embodiment shown in FIG. 1, the read-only memory 102 is provided with a distance / azimuth calculation means 208, and in this calculation means 208,
The distance L _MR between the own ship position M and the target position R and the bearing are calculated, and the calculation result is added to the longitude and latitude of the own ship position M and the target position R as shown in FIG.
To display.

In the example shown in FIG. 6, in addition to the ship position and the target position, the current time, the speed of the ship, the course, the direction of the target position, the distance to the target position, and the time required to reach the target position are displayed. Indicate the case. FIG. 7 shows a flow chart for explaining an outline of a program of each unit constituting the ship position display device according to the present invention. The target position setting key 205 is operated in step S ₁ , and the longitude and latitude of the target position R are read in step S ₂ .

In step S ₃ , the target position is displayed at the center of the screen. The current position is read again in step S ₄ . In step S ₅ , it is determined whether or not the current position is on the screen. If it is within the screen, go to step S ₆ . If outside the screen branches to step S _7, increasing the scale of the screen by controlling the scale changing unit 112 at step S _7, expanding the display range, the flow returns to step S _4.

At step S ₆ , the own ship position M is changed to the target position R.
It is determined whether or not it is displayed close to. If not approaching, the process directly returns to step S ₄ . If approaching lowering the scale factor in step S _8, narrowing the range to be displayed.

[0024]

As described above, according to the present invention, once the target position setting key 205 is depressed, even if the own ship is pushed out of the screen, the device is not touched at all. The target position R and the own ship position M can be automatically displayed on the screen. Therefore, the ship operator does not lose sight of the target position and can devote himself to the ship operation, so that he can devote himself fully to the rescue of the person who dropped the water.

In the above description, one target position has been described, but a plurality of target position storage means 204 can be provided to set a plurality of target positions. When a plurality of destination positions are set, the distance from the ship to the closest destination position, the bearing, etc. are displayed, and when the first destination position is reached, the distance to the second closest destination position is targeted,
It can also be configured to display the direction and the like. When configured in this way, it can be used to store the positions of a plurality of nets or the positions of cages.

Further, in the above, the key 20 for setting the target position is set.
5, the target position is input by one-touch to store the target position. However, an arbitrary position inside or outside the display screen is input as the target position by an input means such as a key board or a trackball, and the position is stored. Can be stored in the target position storage means 204, and the input position can be displayed in the center of the display screen at the same time as the input is finished, and at the same time, the own ship position M can also be displayed in the screen.

As described above, when the arbitrary position apart from the own ship can be inputted as the target position, it is used for setting the goal or the turning point of the yacht race as the target position, for example. be able to. Further, it can be used to set the position of the fish farm or the net as the target position.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of a ship position display device proposed in claim 1 of this application.

FIG. 2 is a diagram for explaining a scale value used in the embodiment of FIG.

FIG. 3 is a diagram showing an example of a display screen for explaining a case where the embodiment of FIG. 1 is operated as a conventional track recording device.

FIG. 4 is a view showing an example of a display screen for explaining a case where the embodiment of FIG. 1 is operated as the own ship position display device of the present invention.

FIG. 5 is a block diagram for explaining an embodiment of the own ship position display device proposed in claim 2 of this application.

FIG. 6 is a diagram showing an example of a display screen for explaining the operation of FIG.

FIG. 7 is a flowchart for explaining an outline of a program that constitutes the own ship position display device of the present invention.

[Explanation of symbols]

 100 Track Recorder 101 Central Processing Unit 102 Read Only Memory 103 Memory 104 Input Means 105 Display Means 106 Display Controller 107 Image Memory 108 Positioning Means 109 Interface 111 Imaging Means 112 Scale Change Means 113 Display Range Storage Means 200 Own Ship Position Display device 201 Newly added portion 202 First scale determination means 203 Target position display means 204 Target position storage means 205 Target position setting key 206 Second sea area detection means 207 Second scale determination means 208 Distance and heading calculation means 209 Second sea area Means of storage

Claims (2)

[Claims] 1. A. First Embodiment Positioning means that outputs its own position with numerical values corresponding to longitude and latitude, display means that displays the position obtained by this positioning means as the own ship position on the screen, and on the screen corresponding to the set scale value A ship position display device comprising display range storage means for storing the range of the displayed sea area, and scale changing means for changing the range of the sea area stored in the display range storage means. A key for setting a target position, and C. A target position storing means for reading the position where the target position setting key is operated from the positioning means and storing the read position; A target position display means that is activated by operating the target position setting key and displays the target position stored in the target position storage means in the center of the screen; It is started by operating the target position setting key, and it is determined whether or not the own ship position is within the sea area stored in the display range storage means with the target position displayed in the center of the screen, First scale determining means for giving a proper scale value to the scale changing means so as to display the target position and the own ship position on the screen, and F. A second sea area storage means for storing the sea area determined by the scale value in the direction of expansion of one of the scale values determined by the first scale determination means; A second scale determining means for changing the scale in the expanding direction by the scale changing means by detecting a state where the own ship has entered the sea area stored in the second sea area storing means, and Ship position display device. 2. The ship position display device according to claim 1, wherein a calculation means for calculating a distance between the target position and the ship position and an azimuth of the target position, and a calculation result calculated by the calculation means are displayed. A ship position display device, which is provided with a numerical value display means.