JP2854965B2 - Radar display method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Summary] The present invention relates to a radar display method for displaying a target object captured by radar on a display while indicating a radar coverage area, and in a target object tracking mode, only a portion corresponding to a new radar coverage area. A raster scan type high-intensity display is used to display images on a raster scan type high-intensity display, and to improve visibility on the display. Is stored in the memory and then the data stored in the memory is taken out and displayed on the display based on the data. In the mode in which the radar follows the target object, the new radar coverage and the old radar coverage are different. If they do not match, write data to the memory area corresponding to the new radar In the memory area corresponding to the old radar coverage area, zero data is written, and in the memory area corresponding to the old radar coverage area, zero data is written, and stored in the memory area corresponding to the old radar coverage area. The target data being followed by the radar is displayed on the display by erasing the data.

[Industrial applications]

The present invention relates to a radar display method for displaying a target object captured by radar on a display while indicating a radar coverage area.

[Conventional technology]

When a target object captured by a radar is displayed on a display while indicating the radar coverage, a display having an afterglow (an afterglow display) is conventionally used as the display.

[Problems to be solved by the invention]

However, when the afterglow display is used, there is a problem that the display screen becomes difficult to see in a bright room or the like because the luminance of the screen is low.

Therefore, it is conceivable to use a raster scan type high brightness display instead of the afterglow display. When displaying on a raster scan type high-intensity display, data to be displayed is usually temporarily stored in a frame memory, and then the data stored in the frame memory is taken out. Done. When such a raster-scan type high-luminance display is used, the display screen is not difficult to see even when the room is bright.

However, when the radar is in a mode in which the target follows the target object, the coverage area scanned by the antenna moves as the target object moves, and the area shown on the display (corresponding to the coverage area) also moves. At this time, in the raster-scan high-intensity display, the previous display data is kept stored unless new data is overwritten on the frame memory. There was a problem that it would remain.

The present invention has been made in view of such a problem, and in a mode for following a target object, only a portion corresponding to a new radar coverage area can be displayed on a raster scan type high-intensity display. It is an object of the present invention to provide a radar display method that improves the visibility of a radar.

[Means for solving the problem]

 FIG. 1 is a block diagram showing the principle of the present invention.

In FIG. 1, 1 is a radar and 2 is this radar 1.
A raster scan type high-intensity display for displaying a target object (not shown) captured by the display while showing a radar coverage area, and a radar 1 for displaying on the display 2
The memory which temporarily stores the display data from the memory 3, the data stored in the memory 3 is taken out, and the display on the high brightness display 2 is performed based on the data.

Reference numeral 4 denotes a control unit for controlling writing of display data to the memory 3 and reading of data from the memory 3 to control a display state on the high-intensity display 2. In the mode for following the target object, the writing / writing of the memory 3 is basically performed as follows.
Performs read control.

If the new radar coverage does not match the old radar coverage,
At the same time as writing data to the memory area of the memory 3 corresponding to the new radar coverage, zero data is written to the memory area of the memory 3 corresponding to the old radar coverage,
By erasing data stored in the memory area corresponding to the old radar coverage, the target object followed by the radar 1 is displayed on the high-luminance display 2.

If the new radar coverage and the old radar coverage partially match, data is written to the memory area of the memory 3 corresponding to the new radar coverage, and at the same time, the new radar coverage in the memory 3 is used. By writing zero data to the memory area corresponding to the old radar coverage area where the old radar coverage area does not match, and erasing the data stored in the memory area corresponding to the old radar coverage area, A target object that is followed by the radar 1 is displayed on the high-brightness display 2.

[Action]

In the above-described radar display method of the present invention, in the mode in which the radar 1 follows the target object, if the new radar coverage and the old radar coverage do not match, the control device 4 causes the display data from the radar 1 ( Which has been subjected to predetermined processing)
Is written to the memory area of the memory 3 corresponding to the new radar coverage area, and at the same time, zero data is written to the memory area of the memory 3 corresponding to the old radar coverage area, and is written to the memory area corresponding to the old radar coverage area. The stored data is erased.

On the other hand, when the new radar coverage and the old radar coverage partially match, the control device 4 stores the display data from the radar 1 in the memory area of the memory 3 corresponding to the new radar coverage. At the same time as writing, zero data is written to the memory area corresponding to the old radar coverage area where the new radar coverage area and the old radar coverage area do not match in the memory 3, and to the memory area corresponding to the old radar coverage area. The stored data is erased.

As a result, the target object being followed by the radar 1 is displayed on the high-brightness display 2 while showing only the portion corresponding to the new radar coverage on the high-brightness display 2.

〔Example〕

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 is a block diagram showing one embodiment of the present invention. In FIG. 2, reference numeral 1 denotes a radar for capturing a target object (not shown), and the radar 1 captures the target object. Information obtained in the power space is output, for example, in a coordinate system as shown in FIG. That is, an origin position of the radar 1, the azimuth angle Az and elevation E _l gives the orientation of the radar 1 (beam direction) by a distance R from the origin in this orientation, trapping space coordinates (R, Az , E _l ).

Reference numeral 2A denotes a raster-scan high-luminance display for displaying the target object captured by the radar 1 while showing the radar coverage. In the present embodiment, as shown in FIG.
This is to display a target capturing screen by the scope 2a and the C scope 2b. Here, the B scope 2a displays captured information with the azimuth angle Az as the horizontal axis and the distance R as the vertical axis, and the C scope 2b displays the azimuth angle Az as the horizontal axis and the elevation angle.
The captured information is displayed with E ₁ as the vertical axis.

Further, 3A is a frame memory for temporarily storing display data (video data) from the radar 1 when displaying on the display 2A. The data stored in the frame memory 3A is taken out, and based on this, a high-luminance display 2A is displayed.
Is displayed.

4A is a control device that controls the display state on the high-brightness display 2A by controlling the writing of display data to the frame memory 3A and the reading of data from the frame memory 3A, and the control device 4A includes: Input buffer 5, selector 6, CP
It comprises a U7, a write address generator 8 and a read address generator 9.

The input buffer 5 is for adjusting the input speed of video data from the radar 1, and the selector 6
Video data from the radar 1 which is switched according to a control command from U7 and is input via the input buffer 5,
And zero data are selectively output.

The CPU 7 operates according to the control flow shown in FIG. 5. In the mode in which the radar 1 follows the target object, the CPU 7 receives information from the radar 1 and determines whether or not the coverage area of the radar 1 has changed. The write / read control of the frame memory 3A is performed by controlling the operations of the write address generator 6 and the write address generator 8. The detailed operation will be described later with reference to FIG.

The read address generator 9 generates a read address to read data stored in the frame memory 3A.

Reference numeral 10 denotes a D / A converter that converts data read from the frame memory 3A from a digital value to an analog value and outputs the analog value to the high-luminance display 2A.

The operation of the apparatus of this embodiment configured as described above
Description will be made with reference to the drawings.

First, from the radar 1, the CPU 7 of the control device 4A sends information (NL, N) regarding the left limit position and the right limit position of the new radar coverage area.
And R), the current beam position of the radar 1 (orientation) information about (Az, E _l) and is input (step S1), CPU 7
Compares the left limit position NL of the new radar coverage with the left limit position OL of the old radar coverage (before the coverage change) (step S2) to determine whether the coverage of the radar 1 has changed. I do. here,
NL, NR, OL, OR which is information about left limit position and right limit position
Is the azimuth angle Az described above with reference to FIG.
Given by

If the new radar coverage is the same as the old radar coverage (NL = OL), that is, if there is no change in the radar coverage, step S4
Move to

On the other hand, if it is determined in step S2 that NL ≠ OL, that is, the radar coverage has changed, first, the CPU 7 replaces the radar related to the coverage (step S2).
S3). In other words, the left limit position of the data to be erased (starting point of the erase data) OSTA is the left limit position OL of the old radar coverage area, and the right limit position OEND of the data to be erased is the right limit position of the old radar coverage area.
In addition to the OR, the left limit position NL and the right limit position NR of the new radar coverage are respectively set to the left limit position OL of the old radar coverage.
And the rightmost position OR.

Thereafter, with the selector 6 switched to the input buffer 5 side, a new video data string is input from the radar 1 (step S4), and at the same time, the starting point of the write video data is set in the write address generator 8 (step S4). S
5) The new video data sequence is transferred to the frame memory 3A via the input buffer 5 and the selector 6, and in accordance with the write address from the write address generator 8, to the memory area corresponding to the new radar coverage area of the frame memory 3A. Writing is performed (step S6).

Now, after writing a new video data string for the current beam position (Az, _El ) to the frame memory 3A, the start point OSTA of the erase data at the present time and the right end position OE of the erase data are set.
Compare with ND (step S7), if OSTA ≦ OEND, the start point OSTA of the erased data at the current time is the current radar coverage NL
It is determined whether or not it is within the range of NRNR (step S8).
The starting point OSTA of the erased data at this time is the current radar coverage.
If it is not in the range of NL to NR, for example, in the state shown in FIG. 4, the selector 6 is switched to select and enter the zero data side (step S9), and at the same time, the start point OSTA of the erase data is written. After being set in the address generator 8 (step S10), the zero data string is transferred to the frame memory 3A via the selector 6, and according to the write address from the write address generator 8, the old radar coverage of the frame memory 3A is stored. The data is written to the corresponding memory area (step S11).

In step S8, the starting point OSTA of the erased data at the present time
Is determined to be in the range of the current radar coverage NL to NR, the writing of the zero data string in steps S9 to S11 is not performed. In this case, as shown in FIG. 4, the area where the erased data exists (the old radar coverage area) and the area where the new video data string is written (the new radar coverage area) overlap, and the new radar This is because the erased data in the covered area is overwritten by writing a new video data string, and is eventually erased.

As described above, when it is determined in step S8 that the starting point OSTA of the erased data at the present time is within the range of the current radar coverage NL to NR, or after the writing of the zero data string is completed in steps S9 to S11, , The starting point of erased data OSTA
And replace it with OSTA + 1 (step S1
2) The selector 6 is switched to the input buffer 5 again (step S13).

When the coverage of the radar 1 is changed by repeating the procedure of steps S1 to S13, a new video data string is stored in a memory corresponding to the new radar coverage of the frame memory 3A for one row. At the same time as writing to the area, in the same cycle as this, zero data is written to the memory area corresponding to the old radar coverage area of the frame memory 3A, and when all the new video data strings are written, the frame memory 3A In the memory area corresponding to the old radar coverage area (a portion not overlapping with the new radar coverage area), all zero data is written, and all the old data is erased. This is because the width of the radar coverage is always the same.

As a result, a raster-scan high-intensity display
Even if 2A is used for radar display, when the antenna scanning coverage (radar coverage) of the radar 1 moves, the data of the new radar coverage can be written and the data of the old radar coverage can be erased at the same time. Therefore, the old radar coverage does not remain displayed, and only the portion corresponding to the new radar coverage is shown on the high-brightness display 2A while being followed by the radar 1 on the high-brightness display 2A. Since the target object is displayed, the visibility of the operator on the display 2A is greatly improved.

〔The invention's effect〕

As described in detail above, according to the radar display method of the present invention (claims 1 and 2), when a raster scan type high-intensity display is used for radar display, a new radar By writing zero data at the same time as writing the data of the coverage area, the data of the old radar coverage area was erased, so only the part corresponding to the new radar coverage area can be displayed on the high brightness display, This has the effect of greatly improving the visibility of the operator on the display.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the principle of the present invention, FIG. 2 is a block diagram showing one embodiment of the present invention, and FIG. 3 is a diagram for explaining a coordinate system in a space where a target object is captured by the radar of the present embodiment. FIG. 4 is a diagram showing a display state on a display in the present embodiment, and FIG. 5 is a flowchart for explaining the operation of the present embodiment. In the figure, 1 is a radar, 2, 2A is a high brightness display, 2a is a B scope, 2b is a C scope, 3 is a memory, 3A is a frame memory, 4, 4A is a control device, 5 is an input buffer, 6 is a selector, 7 is a CPU, 8 is a write address generator, 9 is a read address generator, and 10 is a D / A converter.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) G01S 7/04-7/26

Claims (2)

(57) [Claims] 1. A radar display method for displaying a target object captured by radar on a display while indicating a radar coverage area, wherein a high brightness display of a raster scan type is used as the display, and Is displayed, the display data is temporarily stored in a memory, the data stored in the memory is taken out, and the display on the display is performed based on the data. If the new radar coverage area and the old radar coverage area do not match in the following mode, data is written to the memory area of the memory corresponding to the new radar coverage area, and the old radar coverage area of the memory is written at the same time. Zero data is written to the memory area corresponding to the coverage area, and the data stored in the memory area corresponding to the old radar coverage area is written. By going to erase the data, and displaying the target object being tracking by the radar on the display, radar display method. 2. In a mode in which the radar follows the target object, if the new radar coverage partially matches the old radar coverage, a memory corresponding to the new radar coverage of the memory. At the same time as writing data to the area, zero data is written to the memory area corresponding to the old radar coverage area where the new radar coverage area and the old radar coverage area do not match in the memory, 2. The target object being followed by the radar is displayed on the display by deleting data stored in a memory area corresponding to the radar coverage. Radar display method.