JPS613079A - Radar equipment - Google Patents

Abstract

PURPOSE:To achieve a higher reliability of display position for a course zone and dangerous zone regardless of movement of a selected target due to forces of tide and wind, by providing a means of setting a target as selected one, a target information table and a linear display means. CONSTITUTION:A distance/bearing updating section 6 memorizes a target captured and tracked on a target information table 7 while updating the distance and bearing thereof following the tracking. Then, the table 7 memorizes both the distance and bearing of each target numbered when there are multiple targets captured by a target recognizing section 4. A track ball 8 displays a marker on a radar screen 2 and moves the marker position to a desired position with the rotation thereof 8. Then, the mark positions rT and thetaT are further sent to a selected target judging section 9. Here, the judging section 9 checks the positions rT and thetaT upon with the mark positions r and theta of each target and selects and sets the positions r and theta as selected target when coinciding with the positions rT and thetaT. On the other hand, a switch section 10 specifies the position to which the target is connected with a straight line.

Description

DETAILED DESCRIPTION OF THE INVENTION +a) Technical Field The present invention relates to a radar device that can capture and track objects recognized as targets from radar echoes.

(g)) Prior art and its disadvantages This type of radar device is a general ARPA (AUTOMAT)
It has the function of automatically capturing and tracking objects recognized as targets from radar echoes. Additionally, this ARPA device has an optional function that can display the route zone. However, in this case, the radar image and the route zone are not directly related. That is, the route zone is only input manually and has no relation to radar echoes. On the other hand, generally, a navigation zone is represented by a plurality of buoys, etc., and although ideally these buoys should be fixed to land, in reality they move due to the force of the tide and wind. For this reason, in conventional devices, even if the parts that can be recognized as buoys are manually connected with lines and displayed as a navigation zone, there is a drawback that reliability is low because they are not directly related to radar echoes.

(C1 Purpose of the Invention The purpose of this invention is to solve the above-mentioned inconveniences, and by manually specifying what is recognized as a buoy from the radar echo, the echo can be automatically tracked, and related buoys can be tracked in a straight line. By connecting and displaying the route, you can display a realistic navigation route on the radar screen, or manually indicate a target that has been recognized as a dangerous target, and automatically track its echo to create a circle around the target. To provide a radar device capable of displaying a realistic dangerous area by displaying the following information.

1d1 Structure of the invention In summary, this invention continuously tracks specific echoes on a radar and displays related echoes connected with straight lines or a circle centered on the echo. be.

The present invention provides means for setting a single target or a plurality of targets specified by an input means such as a trackball as a selected target; a target information table that stores correspondences with targets; and a target information table that searches for targets corresponding to each of the selected targets and connects the targets on the radar screen, or connects the targets around the target. and line display means for displaying a line such as a circle.

(e) Embodiment FIG. 1 is a block diagram of an ARPA device which is an embodiment of the present invention.

A video signal is output from the radar 1 to a radar screen 2 and an echo detection section 3, and an echo is displayed on the radar screen 2. In addition, the radar antenna direction and the bow direction are also input to the echo detection section 3, and the echo positions r and θ are detected from this information.The target object recognition section 4 selects echoes that can be recognized as targets from among the echo positions r and θ. Recognize.

In order to recognize a target object from an echo, for example, if echo signals of a certain level or higher continuously appear at the same position in several radar scans, that echo position is recognized as a target object. Such target object recognition methods are already known. The capturing and tracking unit 5 captures what is recognized as a target,
Track. Furthermore, the distance and orientation updating unit 6 stores the captured and tracked targets in the target object information table 7, and updates the distance and orientation according to the tracking. In the target object information table 7, when there are a plurality of targets captured by the target object recognition unit 4, a target number is assigned to the winter target and the distance and direction are also stored.

The trunk ball 8 displays a trackball marker on the radar screen 2, and the position of the marker is moved to an arbitrary position by rotation of the trunk ball 8. The trackball mark position 1) rt, θ, is further sent to the selected target determining unit 9. The selected target determining unit 9 matches the trunk ball mark position r□, θ1 with ", θ" of each target stored in the target information table 7, and calculates 'T+0.
Select r and θ that match 1. This selected target is set as the selected target.

The switch section 10 specifies the group of targets selected by the selected target determining section 9 and the position of the target when connecting the targets in the group with a straight line. The number of the selected target is output from the selected target determining unit 9, and recognition recognizes the group and target position of the target based on the number and the group and target position within the group specified by the switch unit 10. A code is created by a recognition code creation section 1). This recognition code is sent to the recognition code setting section 12. The recognition code setting unit 12 sets a recognition code at the position of the corresponding target number in the target information table 7. The recognition code represents the group and the position within the group. For example, A(4,5) with target number 2 means that target number 2 is in group A.
, and indicates that it is an intermediate target connected to target number 4 and target number 5.

The axillary portion 13 between targets corresponds to the line display means of the present invention. This inter-target axillary section 13 searches for targets for which recognition codes are set in the target information table 7, and searches for targets from the first target r, θ to the final target r, θ for each group according to the recognition code. Display in a straight line.

As described above, it is possible to continuously track specific echoes on the radar designated by the track pole 8, and to connect related echoes with straight lines and display them on the radar screen 2 using the switch section 10.

FIG. 2 shows an example of the display of the ARPA device. In the figure, A1-A4 indicate the selected targets of A group, and B1
~B4 indicates the selected target of B group. In this embodiment, a plurality of targets are connected by straight lines for each group, but if the selected target is a buoy placed in the center of a dangerous area, the line display means will connect the targets around the selected target. You can also display the dangerous area as a circle.

(f) Effects of the Invention According to the present invention, as described above, since the selected target is tracked, when displaying the route zone, dangerous area, etc., the radar image and the route zone, dangerous area, etc. Even if the selected target moves due to the force of the tide or wind, the display position of the navigation lane or dangerous area can be made highly reliable.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an ARPA device that is an embodiment of the present invention. FIG. 2 is a diagram showing an example of display by the device. 7-Target information table.

Claims (1)

[Claims] (1) In a radar device that captures and tracks objects recognized as targets from radar echoes, means for setting a single target or multiple targets specified by an input means such as a trackball as selected targets; a target information table that stores correspondence between targets captured and tracked from radar echoes and each of the selected targets; and a target information table that searches for a target corresponding to each of the selected targets from the target information table. A radar device comprising line display means for connecting the targets on a radar screen or displaying a line such as a circle around the targets.