JPH02291990A - Multi-radar video synthetic display device - Google Patents

Abstract

PURPOSE:To enable displaying of a real-time radar video on one screen in a group of radars by a method wherein a scan system of a radar video signal is converted to be written into a memory and based on position information, the scan system is read to be synthesized. CONSTITUTION:Video signals from radars #1 and #2 are digitized with A/D converters 10 and 20 and angle information of a polar coordinate system is converted to a rectangular coordinate with coordinate converters 12 and 22 to be written into memories 11 and 21. Then, a reading control circuit 14 generates a desired reading address with respect to the memories 11 and 21 based on radar position information to be transmitted from the radars #1 and #2, video data read from the memories 11 and 21 are converted into analog signals with D/A converters 13 and 23 and synthesized with a synthesization circuit 15 to be shown on a screen of a display device 16. This enables determining and monitoring of a wide range of coverage in a group of radars containing fixed and mobile stations in real time at a pivotal sector of a network.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a multi-radar composite display device that displays multiple radar videos on one screen. 《Background of the Invention》 As is well known, radar sites, which are fixed radar stations, are scattered throughout Japan, but in the past, information such as targets detected within the coverage area from each fixed radar station was centrally collected. These images are transmitted and displayed in a centrally synthesized manner. In recent years, such a composite display of eye-catching objects, etc. alone is insufficient for centralized monitoring information, and there has been a demand for a composite display of information on the entire coverage area of each fixed radar station, that is, radar video. It's increasing.

(Problem to be solved by the invention) Therefore, in order to meet this demand, we will develop a multi-radar video composite display device, but since radar devices are also installed on aircraft and ships, It would be very convenient if the radar video could be displayed simultaneously, allowing for more effective centralized monitoring. The present invention was made in view of these problems, and its purpose is to provide a multi-radar video composition that can display real-time radar video of a group of radar devices including fixed radar stations and mobile radar stations on a single display screen. The purpose is to provide display devices. (Means for Solving the Problems) In order to achieve the above object, a multi-radar video synthesis and display device has the following configuration.That is, the multi-radar video synthesis and display device of the present invention has the following configuration: a plurality of A/D converters for digitizing corresponding ones of the plurality of radar videos; a plurality of memories for storing outputs of corresponding ones of the plurality of A/D converters; and for each of the plurality of radar videos; a plurality of coordinate converters for calculating an address for writing a corresponding radar video into the corresponding memory based on the angle information;
a readout control circuit that generates readout address signals for each of the plurality of memories based on the plurality of radar position information obtained from the plurality of radar devices; a raster scan type display on which the plurality of radar videos are displayed; A plurality of D/A'RtA devices that convert the outputs of corresponding ones of a plurality of memories into analogs, or one D/A'RtA device that converts the combined output into analogs and outputs it to the display device.
/A converter; receives the outputs of the plurality of memories via or directly through the plurality of D/A converters, synthesizes them, and directly or directly receives the output of the plurality of D/A converters;
The present invention is characterized by comprising: a synthesizer for sending data to the display device via a converter; and; (Function) Next, the function of the multi-radar video synthesis display device of the present invention configured as described above will be explained. As is well known, since radar video is a PPI display signal, it is scanned and transformed into a raster scan signal and written into memory. Then, based on the radar position information, a memory read address signal is created in accordance with the raster scan of the display, and the radar video read from the memory is synthesized and displayed on the display. As a result, even if the radar station moves, the coverage area of the mobile radar station will be displayed on the display screen along with the coverage areas of fixed radar stations and other mobile radar stations. (Example) Examples of the present invention will be described below with reference to the drawings. FIG. 1 shows a multi-radar video synthesis display device according to an embodiment of the present invention. The operation of displaying radar videos from two radar devices in a composite manner will be described below with reference to FIG. Radar information (video signal and angle information) and radar position information are transmitted from radar devices #1 and #2 (not shown) via wireless transmission or the like. The video signal from the radar device (#1.#2) is sent to the corresponding A/D converter (10.20)
are input into the corresponding memories (11.21), respectively, and are digitized. Memory (11.2
1), the address corresponds to each pixel (given by X-Y orthogonal coordinates) on the display screen of a raster scan display. Therefore, the coordinate converter (12.22) is
Polar coordinates (R
, θ) to the orthogonal coordinates (X, Y) and the memory (11.
21) Generate an address to write to. In other words,
The digitized video data is scan converted and written to memory (11.21). Next, the readout control circuit 14 reads the memory (11.21) based on the radar position information transmitted from the radar device (#1., #2).
Generate the desired read address for . and,
The video data thus read from the memory (11.21) is converted into an analog signal by the corresponding D/A converter (13.23), and then synthesized by the synthesis circuit 15. That is, in the synthesis circuit 15, for example, if the coverage area of radar device #1 is fixedly arranged at a predetermined position on the display screen, the analog video signal of radar device #2 is It adds and synthesizes the signals. If radar device #1 is a fixed radar station, the position can be set fixedly, but if it is a mobile radar station, the position must be set each time, for example. The synthesized analog video signals are thus synthesized and displayed on the display screen of the display 16 as shown in FIG. 2, for example. In Fig. 2, radar device #2 is a mobile radar station moving in the direction of radar device #1, and their coverage areas did not overlap at time t9 (Fig. 2 (a) ), next time t ni
1 shows the case of overlap (Figure 2 (b)). As mentioned above, the coverage area of radar device #1 is displayed at a fixed position. Note that the synthesis circuit 15 is formed of an analog circuit in this embodiment, but it is constructed of a digital circuit, and a circuit is installed between the synthesis circuit 15 and the display 16 instead of the D/A converter (13.23). Of course, one D/A converter may be interposed.

(Effects of the Invention) As explained above, according to the multi-radar video synthesis display device of the present invention, radar information (radar video and angle information) and radar position information of multiple radar devices are taken in, and the positional relationship of the radar devices is Since multi-radar video can be synthesized in real time, it is possible to grasp and monitor a wide coverage area consisting of radar equipment groups, including fixed radar stations and mobile radar stations, at the core of the radar equipment network. It is effective.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of the configuration of a multi-radar video synthesis display device according to an embodiment of the present invention, and Fig. 2 shows a case in which the coverage area does not overlap due to the positional relationship of the radar devices (a case in which the coverage area overlaps with that in the same figure <<a>>>) It is a figure which shows the display example of (the same figure (b)). 10.20...A/D converter, 11.21...
...Memory, 12.22...Coordinate converter, 13.23...D/A converter, 14...
... Readout control circuit, 15 ... Synthesis circuit, 16 ... Display device.

Claims (1)

[Claims] a plurality of A/D converters for digitizing corresponding ones of the plurality of radar videos obtained from the plurality of radar devices;
a plurality of memories that store outputs of corresponding ones of the plurality of A/D converters; and calculating an address for writing the corresponding radar video into the corresponding memory based on angle information about each of the plurality of radar videos. a plurality of coordinate converters; a readout control circuit that generates readout address signals for each of the plurality of memories based on the plurality of radar position information obtained from the plurality of radar devices; and a raster scan in which the plurality of radar videos are displayed. a plurality of D/A converters that convert the outputs of corresponding ones of the plurality of memories into analogs, or one D/A converter that converts the combined output into analogs and outputs it to the display device; ; receiving the outputs of the plurality of memories via the plurality of D/A converters or directly and synthesizing them; and outputting the combined output directly or via the one D/A converter; A multi-radar video synthesis display device comprising: a synthesizer for sending data to a display device;