JP4990445B2 - Ship position display device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
Conventionally, the wake display recording device fixes the current position of the ship on the latitude / longitude coordinates and draws the ship's wake, and the latitude / longitude coordinates are fixed, and the ship's wake and And a display mode for drawing the current position.
[0002]
In addition, when displaying the current position and track of another ship, it is necessary to obtain and display the relative position information of the other ship with respect to the own ship by means of radar. The ship position was displayed relatively.
[0003]
[Problems to be solved by the invention]
On the other hand, from the viewpoint of collision prevention and life safety, an automatic ship identification system (AIS: Universal Shipborne Automatic Identification System) (hereinafter referred to as AIS) has been systematized. This AIS is a function that regularly broadcasts ship-specific information such as ship information such as position information and navigation information of the ship and ship-specific information such as ship name and cargo, and necessary information by receiving the broadcast from other ships. It has a function to extract.
[0004]
Therefore, AIS is used not only for the purpose of collision prevention and life safety, but also when several vessels are maneuvering or navigating as a fleet by actively using information on the current position, course, and speed of other vessels. Can also be used effectively.
[0005]
However, in the conventional track display recording apparatus that displays the position of the ship and the other ship based on the information of the other ship obtained from the AIS, the position of the other ship is always displayed as a relative position to the ship. Therefore, the ship position is displayed at the reference position of the screen, for example, at the center of the screen. Therefore, the display contents in each ship constituting the fleet are different, and it is not possible to display based on the position of an arbitrary ship among a plurality of ships constituting the fleet.
[0006]
The object of the present invention is to solve the above-mentioned problems and to use any ship among a plurality of ships including the other ship and the own ship identified by the ship automatic identification device (AIS) as a reference. An object of the present invention is to provide a ship position display device capable of displaying a position.
[0007]
[Means for Solving the Problems]
The present invention includes means for positioning the ship position, a ship automatic identification device (AIS), another ship identified by the ship automatic identification device (AIS), and a ship positioned by the ship position positioning means. Among the plurality of vessels, the vessel selected by the vessel selection operation as a reference is set as the reference vessel, the reference vessel is displayed at a preset reference position or a selected reference position in the display screen, and A control unit for displaying the position of a ship other than the reference ship is provided. The control unit displays the reference ship with a mark different from ships other than the reference ship, and displays the ship and the other ship with different marks.
[0008]
As a result, the selected ship is displayed at the reference position in the display screen only by selecting the ship to be used as a reference from among a plurality of ships including other ships and own ship identified by the AIS.
[0009]
In addition, the present invention provides means for obtaining the distance and direction from the reference ship to a ship other than the reference ship and displaying it on the display screen. Thereby, the relative positional relationship of other ships with respect to the reference ship is clarified.
[0010]
Moreover, this invention calculates | requires the distance and relative speed between predetermined ships among several ships including the other ship and own ship identified by the said ship automatic identification apparatus (AIS), and it displays in the said display screen. Means for displaying are provided. Thus, the relative motion between the ships can be grasped from the display of the distance between the predetermined ships and the relative speed.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
The structure of the ship position display apparatus of this invention is demonstrated with reference to FIGS.
FIG. 1 shows two display examples of the display unit. Here, a plurality of perpendicular thin lines represent a longitude line and a latitude line. Sa is a mark indicating the position of the ship, and Sb and Sc are marks indicating the position of the other ship. The curves extending from these marks indicate the wake of each ship. (A) is an example in which the position of two other ships is displayed relatively with the own ship at the center of the screen and north at the top of the display screen. (B) is an example in which the relative position relationship between the ship and the other ship is displayed with the other ship indicated by Sb at the center of the screen and the heading of the other ship on the display screen. It is.
[0012]
The filled mark represents a reference ship (hereinafter referred to as “reference ship”) used for relative display of the positional relationship between a plurality of ships. A white mark represents a ship other than the reference ship. That is, this reference ship is displayed at a predetermined position on the screen (in the center of the screen in this example), and the positions of other ships are displayed relative to each other. As shown in FIG. 1, the reference ship is displayed in a different display color from ships other than the reference ship, and the own ship and the other ship are displayed in different shapes.
Here, the three ships indicated by Sa, Sb, and Sc constitute a purse seine fleet. For example, there are three ships: a net ship that sprinkles nets, a search ship that searches for fish with a fish finder, and a transport ship that takes the fish out of the net to the port.
[0014]
In the figure, Lab represents the distance between own ship Sa and other ship Sb, Lac represents the distance between own ship Sa and other ship Sc, and Lbc represents the distance between two other ships Sb and Sc. Yes.
[0015]
SPDab represents the relative speed between the own ship Sa and the other ship Sb, SPDac represents the relative speed between the own ship Sa and the other ship Sc, and SPDbc represents the relative speed between the other ships Sb and Sc.
[0016]
Furthermore, θab is the direction of the other ship Sb as seen from the own ship Sa, θac is the direction of the other ship Sc as seen from the own ship Sa, and θbc is the direction of the other ship Sc as seen from the other ship Sb. Each direction is shown.
[0017]
FIG. 2 is a block diagram showing a configuration of the ship position display device. Here, the VHF transceiver 12 is a device that transmits and receives information by AIS, and 11 is an antenna thereof. The GPS receiver 14 positions the position of the ship (own ship) on which this device is mounted. Reference numeral 13 denotes the antenna. The display unit 16 displays the positions and tracks of the ship and other ships. The input unit 17 inputs display mode setting operations and the like. The data processing unit 15 performs the following processing. (1) The current ship position and ship speed information is read from the GPS receiver 14, and the ship-specific information such as the ship name and cargo to be transmitted is added to these information, and the VHF transceiver is used as transmission data. 12 is output. (2) Read AIS information from other ships from VHF transceiver 12. (3) Display and output the position and track of own ship and other ships to the display unit 16. (4) Read display mode setting operation and the like by the input unit 17.
[0018]
FIG. 3 is a flowchart showing main processing contents of the data processing unit 15 for display processing on the display unit 16 shown in FIG.
First, radio waves transmitted from the AIS of another ship are received, and information (position information, voyage information, ship-specific information, etc.) of one or more other ships is acquired (n1). Subsequently, the ship is initially set as a reference ship (n2). Further, initial setting of the display mode is performed (n3). For example, a north-up display mode in which north is directed to the upper side of the screen is set, and a display mode in which the reference ship is displayed in the center of the screen is set.
[0019]
Subsequently, according to the display mode, the position and wake of each ship are displayed together with latitude and longitude lines (n4). Furthermore, the relative information between each ship is displayed (n5). That is, as shown in FIG. 1, the distance, relative speed and direction between two ships are displayed numerically. Thereafter, the key operation and the operation of the input unit such as the trackball are read, and processing corresponding to the operation is performed. For example, by aligning the cross cursor CC shown in FIG. 1A with the mark Sb indicating the position of another ship and clicking the selection button, the other ship indicated by Sb is selected as the reference ship (n6 → n7). After the reference ship setting is changed in step n7, the process is performed in step n4 so that the reference ship is displayed at the center of the screen as shown in FIG.
[0020]
If a display mode selection operation is performed by a key operation, the display mode setting is changed (n8 → n9). Thereby, the display according to the changed display mode is performed at step n4. For example, if the reference ship head-up mode in which the heading of the reference ship is directed upward from the screen from the north up mode, the heading of the reference ship Sb is directed upward from the screen as shown in FIG. In addition, the positions of the ship and other ships, the latitude and longitude lines, etc. are redrawn. As another display mode, a course-up display mode in which a predetermined course is directed upward on the screen can be selected.
[0021]
For setting the position of the reference ship to be displayed on the screen, for example, select the mark of the reference ship (Sa in FIG. 1A, Sb in FIG. 1B) with the cross cursor and select this on the screen. The position can be set by selecting the position to be moved.
[0022]
In the example shown in FIG. 1, an example is shown in which the fleet is composed of three ships including the own ship. However, even with the combination of the own ship and one other ship, the own ship and three or more ships The same applies to combinations with other ships.
[0023]
【Effect of the invention】
According to this invention, it is possible to display the selected ship at the reference position in the display screen only by selecting the ship to be used as a reference (reference ship) among other ships or own ship identified by the AIS. it can.
[0024]
Further, according to the present invention, the relative position of the other ship with respect to the reference ship is provided by providing the means for obtaining the distance and direction to the ship other than the reference ship with respect to the reference ship and displaying them in the display screen. The relationship becomes clearer.
[0025]
Further, according to the present invention, a distance and a relative speed between predetermined ships among a plurality of ships including other ships and own ship identified by the ship automatic identification device (AIS) are obtained and displayed on the display screen. By providing the means, the relative movement between the ships can be easily grasped from the display of the distance between the predetermined ships and the relative speed.
[Brief description of the drawings]
FIG. 1 is a diagram showing a display example of a ship position display device. FIG. 2 is a block diagram showing a configuration of the device. FIG. 3 is a flowchart showing a processing procedure of a data processing unit in the device.
11, 13-Antenna Sa-Marks Sb and Sc indicating current position of own ship-CC indicating current position of other ship-Crosshair cursor

Claims (3)

A plurality of ships including a ship positioning means, a ship automatic identification device (AIS), another ship identified by the ship automatic identification device (AIS), and a ship positioned by the ship positioning device; Among these, the vessel selected by the selection operation of the vessel to be used as a reference is set as a reference vessel, and the reference vessel is displayed at a preset reference position or a selected reference position in the display screen, and other than the reference vessel It has a control unit that displays the position of the ship,
The said control part is the ship position display apparatus which displays the said ship and the said other ship with a different shape while displaying the said reference ship with the display color different from ships other than this reference ship.   The ship position display device according to claim 1, further comprising means for obtaining a distance and direction to a ship other than the reference ship with respect to the reference ship, and displaying the distance and direction in the display screen.   The ship position display device according to claim 1, further comprising means for obtaining a distance and a relative speed between predetermined ships among a plurality of ships including the other ship and the own ship and displaying the distance and the relative speed on the display screen.

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