JP2501813B2 - Display device for tracking target status - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for displaying the state of a tracking target in a radar device having a target tracking function.

(Prior Art) In order to avoid collisions between ships during navigation, the observer always grasps the movement of the target to be monitored accurately,
Prompt maneuvering according to the situation is required.
For grasping the trend of the target object to be monitored, for example, a radar device is used that automatically tracks the target by manual or automatic capture, determines the risk of collision with the own ship, and notifies the observer. An example of such a radar device is an automatic collision prevention assistance device (ARPA).

Conventionally, in the radar device as described above, as a display showing a collision risk determination result of the target being tracked with respect to the own ship or a state where tracking is impossible due to disappearance in the radar video signal of the target, for example, radar A method is used in which a tracking symbol is superimposed and displayed on a tracking target image on a video display unit, and the shape, brightness, color, etc. of the tracking symbol are changed according to the state of the tracking target.

FIG. 3 is a block diagram showing an example of a radar display device using a conventional display method, 1 is a radar device, 2 is a speed log, 3 is a gyro compass, 4 is a tracking means, 5
Is a symbol signal generating means, and 6 is a display.

In FIG. 3, the tracking means 4 includes a plurality of tracking signals based on a video signal output from the radar device 1, a ship speed signal output from the speed log 2, and a ship heading signal output from the gyro compass 3. The position and speed of the tracking target are calculated by automatically tracking the target, and the state of the tracking target is determined, that is, the collision risk to the own ship is determined and the loss of the radar video signal of the tracking target is detected. Etc., and outputs a tracking target signal including the position, speed, state of the tracking target, and a target number for distinguishing the tracking target. The symbol signal generating means 5 generates a symbol signal for superimposing and displaying a tracking symbol indicating the state of the tracking target on the tracking target image based on the tracking target signal output from the tracking means 4. The display 6 synthesizes the symbol signal output from the symbol signal generating means 5 and the radar video signal output from the radar device 1 to display the state of the tracking target.

FIG. 4 shows an example of the display screen of the display 6 in FIG. 3, where 7 is the ship symbol, 8a and 8b are tracking symbols, and 9a and 9b are tracking target images.

In FIG. 4, the tracking target images 9a and 9b on the display screen have a tracking symbol 8a and a high collision risk depending on the state of the tracking target 8a. A tracking symbol 8b is displayed so as to be superimposed on the tracking target 9b.

(Problems to be Solved by the Invention) However, in such a conventional display device, since a tracking target state is indicated by a tracking symbol displayed by being superposed on a tracking target image, a plurality of wide-ranging targets are present. When the target is being tracked, there is a limit for the observer to correctly grasp the state of the tracking target depending on the situation, and there is a high possibility that the tracking target and the state will be overlooked. Further, when the tracking target is out of the radar image display range, it is difficult to grasp the state promptly because the tracking target image and the tracking symbol indicating the state are not displayed, and appropriate measures are delayed. There was a problem that it would end up.

(Means for Solving Problems) The present invention has been made to solve the above problems, and displays a tracking symbol indicating the state of a tracking target by superimposing it on a tracking target image. At the same time, an identification symbol is given to each tracking target object, and the tracking target object can be identified by displaying the identification symbol as an identification mark in the vicinity of the tracking target image, and can be further added to the tracking target object. A status display table composed of all identification signals, in which each identification symbol changes and is displayed according to the status of the corresponding tracking target, is constantly displayed at a predetermined location, so that a plurality of areas existing in a wide range can be displayed. It is an object of the present invention to provide a tracking target state display device capable of always promptly grasping the state of the tracking target state.

In order to achieve this object, the present invention inputs the tracking target signal composed of a target number output from the tracking means, such as the position, speed, state and target number for distinguishing the tracking target,
An identification mark signal generating means for generating an identification mark signal for displaying the identification mark as an identification mark in the vicinity of the tracking target image, and all the identification symbols corresponding to the target number, each identification symbol corresponding Table signal generating means for generating a table signal for constantly displaying a state display table that is changed and displayed according to the state of the tracking target, and a tracking symbol indicating the state of the tracking target. Is provided with a symbol signal generating means for generating a symbol signal for superimposing and displaying on the tracking target image.

(Operation) In the present invention having such a configuration, the tracking target signal including the position, speed, state of the tracking target and the target number for distinguishing the tracking target is output from the tracking means. Each time, the symbol signal generating means based on the tracking target signal,
The identification mark signal generating means and the table signal generating means respectively generate a symbol signal, an identification mark signal and a table signal and send them to the display device, so that the tracking symbol indicating the state of the tracking target object is superimposed on the tracking target image. And the identification mark given to the tracking target is displayed as an identification mark in the vicinity of the tracking target image, and is composed of all the identification marks given to the tracking target, and each identification symbol corresponds to The status display table that changes and is displayed according to the status of the tracking target is always displayed at a predetermined location, and the status of all tracking targets is displayed even if there are multiple tracking targets. It becomes possible to grasp easily.

(Embodiment) FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 shows an example of a display screen according to the embodiment of FIG.

In FIG. 1, 1 is a radar device, 2 is a speed log, 3 is a gyro compass, 4 is tracking means, 5 is a symbol signal generating means, 6 is a display, 12 is an identification mark signal generating means, and 13 is a table signal generating. It is a means. Further, in FIG. 2, 7 is a ship symbol, 8a, 8b are tracking symbols, 9a,
9b is a tracking target image, 10a and 10b are identification marks, and 11 is a status display table.

First, the case where a color display is used as the display 6 in FIG. 1 will be described.

The tracking means 4 automatically tracks the target by each signal output from the radar 1, the speed log 2, and the gyro compass 3, calculates the position, speed, etc. of the tracked target, and performs a collision determination calculation for the own ship. The state of the tracking target is classified into, for example, a safe state with a low collision risk and a dangerous state with a high collision risk, and detection of a lost state that cannot be tracked due to the loss of the radar video signal of the tracking target is performed. , A tracking target signal including a position, a speed, a state of the tracking target, a target number for distinguishing the tracking target, and the like.

The above-mentioned automatic tracking and calculation of collision determination are well-known techniques and are used in an automatic collision prevention assistance device (ARPA) and the like. For example, AGBOLE JONES co-authored “AUTOMATIC RA
DAR PLOTTING AIDS MANUAL "(Heinemann: London) (19
(Issued in 1981).

The identification mark signal generating means 12 displays the identification mark corresponding to the target number as the identification marks 10a and 10b in the vicinity of the tracking target images 9a and 9b based on the tracking target signal output from the tracking means 4. The identification mark signal of is output. here,
The target number and the identification symbol are associated with each other, for example, as shown in the following Table 1 with the maximum trackable number being 20.

The state display table 11 is composed of all the identification symbols (for example, A, B, C ... T) corresponding to the target number, and, for example, according to the state of the tracking target to which each identification symbol corresponds, It is displayed in different colors like.

The table signal generation means 13 identifies each table signal for constantly displaying the state display table 11 at a predetermined location on the periphery of the radar image display section based on the tracking target signal output from the tracking means 4. The symbol is set and output so that it is displayed in a display color according to the state of the tracking target shown in Table 2 above.

The symbol signal generating means 5, based on the tracking target signal output from the tracking means 4, sends the tracking symbol 8 to, for example, As described above, a symbol signal for changing the shape and display color and superimposing and displaying on the tracking target images 9a and 9b is output.

The display 6 includes a symbol signal, an identification mark signal, and a table signal output from the symbol signal generating means 5, the identification mark signal generating means 12, and the table signal generating means 13, respectively, and a radar video output from the radar device 1. The signals are combined and color-displayed to obtain a display showing the state of the tracking target.

Next, a case where a monochrome display is used as the display 6 in FIG. 1 will be described.

The radar device 1, the speed log 2, the gyro compass 3, the tracking means 4, and the identification mark signal generating means 12 are the same as in the case of the color display described above.

The state display table 11 is composed of all the identification symbols (for example, A, B, C ... T) corresponding to the target number, and, for example, according to the state of the tracking target to which each identification symbol corresponds, As described above, the display brightness changes.

The table signal generating means 13 displays a table signal for constantly displaying the state display table 11 at a predetermined location on the display screen, based on the tracking target signal output from the tracking means 4, and displays each identification symbol as the above table. -4 is set so that the tracking target is displayed with the display brightness corresponding to the state of the target, and the tracking target is output.

The symbol signal generating means 5, based on the tracking target signal output from the tracking means 4, outputs the tracking symbols 8a and 8b which are displayed by being superposed on the tracking target images 9a and 9b, for example, As described above, the symbol signal for changing the shape and the display brightness is output.

The display 6 includes a symbol signal generating means 5, an identification mark signal generating means 12, and a table signal generating means 13, which are respectively output from the symbol signal, the identification mark signal, and the table signal, and the radar video signal output from the radar device 1. Are combined to perform a monochrome display, and a display showing the state of the tracking target is obtained.

As described above, in the present invention, the state of the tracking target is not indicated only by the tracking symbol superimposed on the tracking target image,
An identification symbol is given to the tracking target object, the identification symbol is displayed as an identification mark in the vicinity of the tracking target image, and a state display table composed of all identification symbols that can be given to the tracking target object is set in advance. Grasping the collision risk of multiple tracking targets existing in a wide area to the ship by displaying the tracking target status by changing the display of the identification symbol in the status display table at all times. Moreover, it is possible to easily confirm the state of the tracking target that is not displayed as an image.

(Effects of the Invention) As described above, according to the present invention, even when a plurality of targets are being tracked, it is possible to avoid troubles such as oversight of the tracking target and the state, and the tracking target is displayed as an image. Even if it is not displayed, the status can be grasped and quick response to the movement of the tracking target can be performed. Therefore, there is an effect that the observer can take more appropriate measures, prevent a dangerous situation similar to a collision of a ship, and greatly contribute to safety.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is an explanatory view showing an example of a display screen in FIG. 1, and FIG.
FIG. 4 is a block diagram showing an example of a conventional display device, and FIG. 4 is an explanatory diagram showing an example of the display screen in FIG. 1: Radar device 2: Speed log 3: Gyro compass 4: Tracking means 5: Symbol signal generating means 6: Display 7: Own ship symbol 8a, 8b: Tracking symbol 9a, 9b: Tracking target image 10a, 10b: Identification Mark 11: Status display table 12: Identification mark signal generation means 13: Table signal generation means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-61-73081 (JP, A) JP-A-61-73016 (JP, A) JP-A-58-221180 (JP, A)

Claims (1)

(57) [Claims] 1. Tracking means for outputting a tracking target signal composed of a position, a velocity, a state of a tracking target and a target number for distinguishing the tracking target; and a tracking target signal output from the tracking means. Identification mark signal generating means for generating an identification mark signal for displaying in the vicinity of the tracking target image, the identification mark corresponding to the target number as an identification mark; and all identification symbols corresponding to the target number. Table signal generating means for generating a table signal for constantly displaying a state display table in which each identification symbol changes and is displayed according to the state of the corresponding tracking target; and a tracking object. A tracking target state display device, comprising: a symbol signal generating means for generating a symbol signal for displaying a tracking symbol indicating a state of a target on a tracking target image.